Finding the Fourth Proportional to 60,475, 90,702.78 and 42,891.52

Step by Step Solution

1. Step 1: Write the proportion equation
   60,475 : 90,702.78 = 42,891.52 : x
2. Step 2: Convert to fraction form
   60,475/90,702.78 = 42,891.52/x
3. Step 3: Cross multiply
   60,475x = 90,702.78 × 42,891.52
4. Step 4: Simplify right side
   60,475x = 3,890,380,102.43
5. Step 5: Solve for x
   x = 3,890,380,102.43/60,475
6. Step 6: Final answer
   x = 64,330.39