Finding the Fourth Proportional to 12,637.10, 17,447.31 and 11,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,637.10 : 17,447.31 = 11,308.50 : x
2. Step 2: Convert to fraction form
   12,637.10/17,447.31 = 11,308.50/x
3. Step 3: Cross multiply
   12,637.10x = 17,447.31 × 11,308.50
4. Step 4: Simplify right side
   12,637.10x = 197,302,905.14
5. Step 5: Solve for x
   x = 197,302,905.14/12,637.10
6. Step 6: Final answer
   x = 15,612.99