Finding the Fourth Proportional to 100,755, 139,042.71 and 56,043

Step by Step Solution

1. Step 1: Write the proportion equation
   100,755 : 139,042.71 = 56,043 : x
2. Step 2: Convert to fraction form
   100,755/139,042.71 = 56,043/x
3. Step 3: Cross multiply
   100,755x = 139,042.71 × 56,043
4. Step 4: Simplify right side
   100,755x = 7,792,370,596.53
5. Step 5: Solve for x
   x = 7,792,370,596.53/100,755
6. Step 6: Final answer
   x = 77,339.79