Finding the Fourth Proportional to 103,696.69, 142,800.18 and 90,078.52

Step by Step Solution

1. Step 1: Write the proportion equation
   103,696.69 : 142,800.18 = 90,078.52 : x
2. Step 2: Convert to fraction form
   103,696.69/142,800.18 = 90,078.52/x
3. Step 3: Cross multiply
   103,696.69x = 142,800.18 × 90,078.52
4. Step 4: Simplify right side
   103,696.69x = 12,863,228,870.13
5. Step 5: Solve for x
   x = 12,863,228,870.13/103,696.69
6. Step 6: Final answer
   x = 124,046.67