Finding the Fourth Proportional to 64,883.12, 89,553.12 and 42,182.72

Step by Step Solution

1. Step 1: Write the proportion equation
   64,883.12 : 89,553.12 = 42,182.72 : x
2. Step 2: Convert to fraction form
   64,883.12/89,553.12 = 42,182.72/x
3. Step 3: Cross multiply
   64,883.12x = 89,553.12 × 42,182.72
4. Step 4: Simplify right side
   64,883.12x = 3,777,594,186.09
5. Step 5: Solve for x
   x = 3,777,594,186.09/64,883.12
6. Step 6: Final answer
   x = 58,221.52