Finding the Fourth Proportional to 72,150.73, 99,567.71 and 40,319.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,150.73 : 99,567.71 = 40,319.62 : x
2. Step 2: Convert to fraction form
   72,150.73/99,567.71 = 40,319.62/x
3. Step 3: Cross multiply
   72,150.73x = 99,567.71 × 40,319.62
4. Step 4: Simplify right side
   72,150.73x = 4,014,531,733.63
5. Step 5: Solve for x
   x = 4,014,531,733.63/72,150.73
6. Step 6: Final answer
   x = 55,640.91