Finding the Fourth Proportional to 2,009,085,171.60, 2,772,692,669.46 and 1,205,342,808.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009,085,171.60 : 2,772,692,669.46 = 1,205,342,808.18 : x
2. Step 2: Convert to fraction form
   2,009,085,171.60/2,772,692,669.46 = 1,205,342,808.18/x
3. Step 3: Cross multiply
   2,009,085,171.60x = 2,772,692,669.46 × 1,205,342,808.18
4. Step 4: Simplify right side
   2,009,085,171.60x = 3,342,045,168,427,017,216
5. Step 5: Solve for x
   x = 3,342,045,168,427,017,216/2,009,085,171.60
6. Step 6: Final answer
   x = 1,663,466,146.52