Finding the Fourth Proportional to 74,738.31, 103,138.82 and 42,909.15

Step by Step Solution

1. Step 1: Write the proportion equation
   74,738.31 : 103,138.82 = 42,909.15 : x
2. Step 2: Convert to fraction form
   74,738.31/103,138.82 = 42,909.15/x
3. Step 3: Cross multiply
   74,738.31x = 103,138.82 × 42,909.15
4. Step 4: Simplify right side
   74,738.31x = 4,425,598,883.66
5. Step 5: Solve for x
   x = 4,425,598,883.66/74,738.31
6. Step 6: Final answer
   x = 59,214.60