Finding the Fourth Proportional to 78,668.18, 117,955.58 and 31,257.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,668.18 : 117,955.58 = 31,257.83 : x
2. Step 2: Convert to fraction form
   78,668.18/117,955.58 = 31,257.83/x
3. Step 3: Cross multiply
   78,668.18x = 117,955.58 × 31,257.83
4. Step 4: Simplify right side
   78,668.18x = 3,687,035,397.89
5. Step 5: Solve for x
   x = 3,687,035,397.89/78,668.18
6. Step 6: Final answer
   x = 46,868.20