Finding the Fourth Proportional to 71,765.76, 99,064.32 and 53,912.55

Step by Step Solution

1. Step 1: Write the proportion equation
   71,765.76 : 99,064.32 = 53,912.55 : x
2. Step 2: Convert to fraction form
   71,765.76/99,064.32 = 53,912.55/x
3. Step 3: Cross multiply
   71,765.76x = 99,064.32 × 53,912.55
4. Step 4: Simplify right side
   71,765.76x = 5,340,810,105.22
5. Step 5: Solve for x
   x = 5,340,810,105.22/71,765.76
6. Step 6: Final answer
   x = 74,420.03