Finding the Fourth Proportional to 64,931.86, 89,591.73 and 42,268.42

Step by Step Solution

1. Step 1: Write the proportion equation
   64,931.86 : 89,591.73 = 42,268.42 : x
2. Step 2: Convert to fraction form
   64,931.86/89,591.73 = 42,268.42/x
3. Step 3: Cross multiply
   64,931.86x = 89,591.73 × 42,268.42
4. Step 4: Simplify right side
   64,931.86x = 3,786,900,872.17
5. Step 5: Solve for x
   x = 3,786,900,872.17/64,931.86
6. Step 6: Final answer
   x = 58,321.15