Finding the Fourth Proportional to 1,155,446,865.40, 1,594,516,674.20 and 660,420,202.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,446,865.40 : 1,594,516,674.20 = 660,420,202.72 : x
2. Step 2: Convert to fraction form
   1,155,446,865.40/1,594,516,674.20 = 660,420,202.72/x
3. Step 3: Cross multiply
   1,155,446,865.40x = 1,594,516,674.20 × 660,420,202.72
4. Step 4: Simplify right side
   1,155,446,865.40x = 1,053,051,025,215,584,256
5. Step 5: Solve for x
   x = 1,053,051,025,215,584,256/1,155,446,865.40
6. Step 6: Final answer
   x = 911,379,879.72