Finding the Fourth Proportional to 65,049.12, 89,711.52 and 42,379.56

Step by Step Solution

1. Step 1: Write the proportion equation
   65,049.12 : 89,711.52 = 42,379.56 : x
2. Step 2: Convert to fraction form
   65,049.12/89,711.52 = 42,379.56/x
3. Step 3: Cross multiply
   65,049.12x = 89,711.52 × 42,379.56
4. Step 4: Simplify right side
   65,049.12x = 3,801,934,744.53
5. Step 5: Solve for x
   x = 3,801,934,744.53/65,049.12
6. Step 6: Final answer
   x = 58,447.14