Finding the Fourth Proportional to 76,702.79, 105,848.78 and 42,711.33

Step by Step Solution

1. Step 1: Write the proportion equation
   76,702.79 : 105,848.78 = 42,711.33 : x
2. Step 2: Convert to fraction form
   76,702.79/105,848.78 = 42,711.33/x
3. Step 3: Cross multiply
   76,702.79x = 105,848.78 × 42,711.33
4. Step 4: Simplify right side
   76,702.79x = 4,520,941,959.12
5. Step 5: Solve for x
   x = 4,520,941,959.12/76,702.79
6. Step 6: Final answer
   x = 58,941.04