Finding the Fourth Proportional to 72,981.83, 109,497.33 and 72,489.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,981.83 : 109,497.33 = 72,489.76 : x
2. Step 2: Convert to fraction form
   72,981.83/109,497.33 = 72,489.76/x
3. Step 3: Cross multiply
   72,981.83x = 109,497.33 × 72,489.76
4. Step 4: Simplify right side
   72,981.83x = 7,937,434,898.60
5. Step 5: Solve for x
   x = 7,937,434,898.60/72,981.83
6. Step 6: Final answer
   x = 108,759.05