Finding the Fourth Proportional to 105,084.43, 145,016.49 and 57,337.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,084.43 : 145,016.49 = 57,337.96 : x
2. Step 2: Convert to fraction form
   105,084.43/145,016.49 = 57,337.96/x
3. Step 3: Cross multiply
   105,084.43x = 145,016.49 × 57,337.96
4. Step 4: Simplify right side
   105,084.43x = 8,314,949,702.96
5. Step 5: Solve for x
   x = 8,314,949,702.96/105,084.43
6. Step 6: Final answer
   x = 79,126.37