Finding the Fourth Proportional to 12,487.32, 17,231.22 and 7,181.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.32 : 17,231.22 = 7,181.10 : x
2. Step 2: Convert to fraction form
   12,487.32/17,231.22 = 7,181.10/x
3. Step 3: Cross multiply
   12,487.32x = 17,231.22 × 7,181.10
4. Step 4: Simplify right side
   12,487.32x = 123,739,113.94
5. Step 5: Solve for x
   x = 123,739,113.94/12,487.32
6. Step 6: Final answer
   x = 9,909.18