Finding the Fourth Proportional to 71,754.48, 99,018.72 and 39,924.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,754.48 : 99,018.72 = 39,924.72 : x
2. Step 2: Convert to fraction form
   71,754.48/99,018.72 = 39,924.72/x
3. Step 3: Cross multiply
   71,754.48x = 99,018.72 × 39,924.72
4. Step 4: Simplify right side
   71,754.48x = 3,953,294,670.76
5. Step 5: Solve for x
   x = 3,953,294,670.76/71,754.48
6. Step 6: Final answer
   x = 55,094.74