Finding the Fourth Proportional to 72,150.33, 99,567.71 and 40,319.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,150.33 : 99,567.71 = 40,319.76 : x
2. Step 2: Convert to fraction form
   72,150.33/99,567.71 = 40,319.76/x
3. Step 3: Cross multiply
   72,150.33x = 99,567.71 × 40,319.76
4. Step 4: Simplify right side
   72,150.33x = 4,014,546,170.95
5. Step 5: Solve for x
   x = 4,014,546,170.95/72,150.33
6. Step 6: Final answer
   x = 55,641.41