Finding the Fourth Proportional to 72,145.92, 99,561.69 and 39,441.00

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145.92 : 99,561.69 = 39,441.00 : x
2. Step 2: Convert to fraction form
   72,145.92/99,561.69 = 39,441.00/x
3. Step 3: Cross multiply
   72,145.92x = 99,561.69 × 39,441.00
4. Step 4: Simplify right side
   72,145.92x = 3,926,812,875.02
5. Step 5: Solve for x
   x = 3,926,812,875.02/72,145.92
6. Step 6: Final answer
   x = 54,428.76