Finding the Fourth Proportional to 72,150.41, 99,569.69 and 40,319.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,150.41 : 99,569.69 = 40,319.38 : x
2. Step 2: Convert to fraction form
   72,150.41/99,569.69 = 40,319.38/x
3. Step 3: Cross multiply
   72,150.41x = 99,569.69 × 40,319.38
4. Step 4: Simplify right side
   72,150.41x = 4,014,587,966.00
5. Step 5: Solve for x
   x = 4,014,587,966.00/72,150.41
6. Step 6: Final answer
   x = 55,641.93