Finding the Fourth Proportional to 12,492.34, 17,221.56 and 7,709.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.34 : 17,221.56 = 7,709.08 : x
2. Step 2: Convert to fraction form
   12,492.34/17,221.56 = 7,709.08/x
3. Step 3: Cross multiply
   12,492.34x = 17,221.56 × 7,709.08
4. Step 4: Simplify right side
   12,492.34x = 132,762,383.76
5. Step 5: Solve for x
   x = 132,762,383.76/12,492.34
6. Step 6: Final answer
   x = 10,627.50