Finding the Fourth Proportional to 65,311.32, 90,148.78 and 42,653.73

Step by Step Solution

1. Step 1: Write the proportion equation
   65,311.32 : 90,148.78 = 42,653.73 : x
2. Step 2: Convert to fraction form
   65,311.32/90,148.78 = 42,653.73/x
3. Step 3: Cross multiply
   65,311.32x = 90,148.78 × 42,653.73
4. Step 4: Simplify right side
   65,311.32x = 3,845,181,734.05
5. Step 5: Solve for x
   x = 3,845,181,734.05/65,311.32
6. Step 6: Final answer
   x = 58,874.66