Finding the Fourth Proportional to 72,401.84, 99,917.25 and 40,569.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,401.84 : 99,917.25 = 40,569.56 : x
2. Step 2: Convert to fraction form
   72,401.84/99,917.25 = 40,569.56/x
3. Step 3: Cross multiply
   72,401.84x = 99,917.25 × 40,569.56
4. Step 4: Simplify right side
   72,401.84x = 4,053,598,966.57
5. Step 5: Solve for x
   x = 4,053,598,966.57/72,401.84
6. Step 6: Final answer
   x = 55,987.51