Finding the Fourth Proportional to 78,248.59, 107,983.11 and 42,438.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,248.59 : 107,983.11 = 42,438.59 : x
2. Step 2: Convert to fraction form
   78,248.59/107,983.11 = 42,438.59/x
3. Step 3: Cross multiply
   78,248.59x = 107,983.11 × 42,438.59
4. Step 4: Simplify right side
   78,248.59x = 4,582,650,720.02
5. Step 5: Solve for x
   x = 4,582,650,720.02/78,248.59
6. Step 6: Final answer
   x = 58,565.28