Finding the Fourth Proportional to 72,346.31, 99,838.61 and 40,081.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,346.31 : 99,838.61 = 40,081.61 : x
2. Step 2: Convert to fraction form
   72,346.31/99,838.61 = 40,081.61/x
3. Step 3: Cross multiply
   72,346.31x = 99,838.61 × 40,081.61
4. Step 4: Simplify right side
   72,346.31x = 4,001,692,428.46
5. Step 5: Solve for x
   x = 4,001,692,428.46/72,346.31
6. Step 6: Final answer
   x = 55,313.01