Finding the Fourth Proportional to 111,587.52, 153,946.26 and 71,290.83

Step by Step Solution

1. Step 1: Write the proportion equation
   111,587.52 : 153,946.26 = 71,290.83 : x
2. Step 2: Convert to fraction form
   111,587.52/153,946.26 = 71,290.83/x
3. Step 3: Cross multiply
   111,587.52x = 153,946.26 × 71,290.83
4. Step 4: Simplify right side
   111,587.52x = 10,974,956,650.80
5. Step 5: Solve for x
   x = 10,974,956,650.80/111,587.52
6. Step 6: Final answer
   x = 98,352.90