Finding the Fourth Proportional to 78,708.93, 108,615.15 and 42,898.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,708.93 : 108,615.15 = 42,898.17 : x
2. Step 2: Convert to fraction form
   78,708.93/108,615.15 = 42,898.17/x
3. Step 3: Cross multiply
   78,708.93x = 108,615.15 × 42,898.17
4. Step 4: Simplify right side
   78,708.93x = 4,659,391,169.28
5. Step 5: Solve for x
   x = 4,659,391,169.28/78,708.93
6. Step 6: Final answer
   x = 59,197.75