Finding the Fourth Proportional to 15,677.43, 21,634.71 and 8,507.31

Step by Step Solution

1. Step 1: Write the proportion equation
   15,677.43 : 21,634.71 = 8,507.31 : x
2. Step 2: Convert to fraction form
   15,677.43/21,634.71 = 8,507.31/x
3. Step 3: Cross multiply
   15,677.43x = 21,634.71 × 8,507.31
4. Step 4: Simplify right side
   15,677.43x = 184,053,184.73
5. Step 5: Solve for x
   x = 184,053,184.73/15,677.43
6. Step 6: Final answer
   x = 11,740.01