Finding the Fourth Proportional to 100,781,880.72, 139,083,399.72 and 56,731,722

Step by Step Solution

1. Step 1: Write the proportion equation
   100,781,880.72 : 139,083,399.72 = 56,731,722 : x
2. Step 2: Convert to fraction form
   100,781,880.72/139,083,399.72 = 56,731,722/x
3. Step 3: Cross multiply
   100,781,880.72x = 139,083,399.72 × 56,731,722
4. Step 4: Simplify right side
   100,781,880.72x = 7,890,440,767,729,918
5. Step 5: Solve for x
   x = 7,890,440,767,729,918/100,781,880.72
6. Step 6: Final answer
   x = 78,292,255.63