Finding the Fourth Proportional to 64,728.32, 89,303.72 and 52,771.10

Step by Step Solution

1. Step 1: Write the proportion equation
   64,728.32 : 89,303.72 = 52,771.10 : x
2. Step 2: Convert to fraction form
   64,728.32/89,303.72 = 52,771.10/x
3. Step 3: Cross multiply
   64,728.32x = 89,303.72 × 52,771.10
4. Step 4: Simplify right side
   64,728.32x = 4,712,655,538.49
5. Step 5: Solve for x
   x = 4,712,655,538.49/64,728.32
6. Step 6: Final answer
   x = 72,806.70