Finding the Fourth Proportional to 64,868.24, 89,472.36 and 62,700.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,868.24 : 89,472.36 = 62,700.56 : x
2. Step 2: Convert to fraction form
   64,868.24/89,472.36 = 62,700.56/x
3. Step 3: Cross multiply
   64,868.24x = 89,472.36 × 62,700.56
4. Step 4: Simplify right side
   64,868.24x = 5,609,967,076.52
5. Step 5: Solve for x
   x = 5,609,967,076.52/64,868.24
6. Step 6: Final answer
   x = 86,482.49