Finding the Fourth Proportional to 78,787.20, 108,722.34 and 42,976.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,787.20 : 108,722.34 = 42,976.92 : x
2. Step 2: Convert to fraction form
   78,787.20/108,722.34 = 42,976.92/x
3. Step 3: Cross multiply
   78,787.20x = 108,722.34 × 42,976.92
4. Step 4: Simplify right side
   78,787.20x = 4,672,551,308.39
5. Step 5: Solve for x
   x = 4,672,551,308.39/78,787.20
6. Step 6: Final answer
   x = 59,305.97