Finding the Fourth Proportional to 78,470.57, 108,290.30 and 42,659.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,470.57 : 108,290.30 = 42,659.79 : x
2. Step 2: Convert to fraction form
   78,470.57/108,290.30 = 42,659.79/x
3. Step 3: Cross multiply
   78,470.57x = 108,290.30 × 42,659.79
4. Step 4: Simplify right side
   78,470.57x = 4,619,641,243.74
5. Step 5: Solve for x
   x = 4,619,641,243.74/78,470.57
6. Step 6: Final answer
   x = 58,871.01