Finding the Fourth Proportional to 15,707.15, 21,675.61 and 8,633.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,707.15 : 21,675.61 = 8,633.42 : x
2. Step 2: Convert to fraction form
   15,707.15/21,675.61 = 8,633.42/x
3. Step 3: Cross multiply
   15,707.15x = 21,675.61 × 8,633.42
4. Step 4: Simplify right side
   15,707.15x = 187,134,644.89
5. Step 5: Solve for x
   x = 187,134,644.89/15,707.15
6. Step 6: Final answer
   x = 11,913.98