Finding the Fourth Proportional to 12,456.08, 17,188.72 and 7,150.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.08 : 17,188.72 = 7,150.76 : x
2. Step 2: Convert to fraction form
   12,456.08/17,188.72 = 7,150.76/x
3. Step 3: Cross multiply
   12,456.08x = 17,188.72 × 7,150.76
4. Step 4: Simplify right side
   12,456.08x = 122,912,411.43
5. Step 5: Solve for x
   x = 122,912,411.43/12,456.08
6. Step 6: Final answer
   x = 9,867.66