Finding the Fourth Proportional to 72,154.72, 99,569.82 and 40,317.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,154.72 : 99,569.82 = 40,317.40 : x
2. Step 2: Convert to fraction form
   72,154.72/99,569.82 = 40,317.40/x
3. Step 3: Cross multiply
   72,154.72x = 99,569.82 × 40,317.40
4. Step 4: Simplify right side
   72,154.72x = 4,014,396,260.87
5. Step 5: Solve for x
   x = 4,014,396,260.87/72,154.72
6. Step 6: Final answer
   x = 55,635.95