Finding the Fourth Proportional to 64,776.81, 89,433.27 and 52,868.55

Step by Step Solution

1. Step 1: Write the proportion equation
   64,776.81 : 89,433.27 = 52,868.55 : x
2. Step 2: Convert to fraction form
   64,776.81/89,433.27 = 52,868.55/x
3. Step 3: Cross multiply
   64,776.81x = 89,433.27 × 52,868.55
4. Step 4: Simplify right side
   64,776.81x = 4,728,207,306.66
5. Step 5: Solve for x
   x = 4,728,207,306.66/64,776.81
6. Step 6: Final answer
   x = 72,992.28