Finding the Fourth Proportional to 1,912,215.57, 2,638,261.60 and 1,085,152.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912,215.57 : 2,638,261.60 = 1,085,152.05 : x
2. Step 2: Convert to fraction form
   1,912,215.57/2,638,261.60 = 1,085,152.05/x
3. Step 3: Cross multiply
   1,912,215.57x = 2,638,261.60 × 1,085,152.05
4. Step 4: Simplify right side
   1,912,215.57x = 2,862,914,983,676.28
5. Step 5: Solve for x
   x = 2,862,914,983,676.28/1,912,215.57
6. Step 6: Final answer
   x = 1,497,171.67