Finding the Fourth Proportional to 100,976.52, 139,346.88 and 55,654.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,976.52 : 139,346.88 = 55,654.50 : x
2. Step 2: Convert to fraction form
   100,976.52/139,346.88 = 55,654.50/x
3. Step 3: Cross multiply
   100,976.52x = 139,346.88 × 55,654.50
4. Step 4: Simplify right side
   100,976.52x = 7,755,280,932.96
5. Step 5: Solve for x
   x = 7,755,280,932.96/100,976.52
6. Step 6: Final answer
   x = 76,802.81