Finding the Fourth Proportional to 2,646,178,638.72, 3,969,377,540.10 and 780,824,271.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646,178,638.72 : 3,969,377,540.10 = 780,824,271.60 : x
2. Step 2: Convert to fraction form
   2,646,178,638.72/3,969,377,540.10 = 780,824,271.60/x
3. Step 3: Cross multiply
   2,646,178,638.72x = 3,969,377,540.10 × 780,824,271.60
4. Step 4: Simplify right side
   2,646,178,638.72x = 3,099,386,326,453,982,208
5. Step 5: Solve for x
   x = 3,099,386,326,453,982,208/2,646,178,638.72
6. Step 6: Final answer
   x = 1,171,268,742.44