Finding the Fourth Proportional to 15,760.08, 21,748.83 and 8,686.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,760.08 : 21,748.83 = 8,686.52 : x
2. Step 2: Convert to fraction form
   15,760.08/21,748.83 = 8,686.52/x
3. Step 3: Cross multiply
   15,760.08x = 21,748.83 × 8,686.52
4. Step 4: Simplify right side
   15,760.08x = 188,921,646.77
5. Step 5: Solve for x
   x = 188,921,646.77/15,760.08
6. Step 6: Final answer
   x = 11,987.35