Finding the Fourth Proportional to 12,649.32, 17,460.99 and 11,320.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,649.32 : 17,460.99 = 11,320.72 : x
2. Step 2: Convert to fraction form
   12,649.32/17,460.99 = 11,320.72/x
3. Step 3: Cross multiply
   12,649.32x = 17,460.99 × 11,320.72
4. Step 4: Simplify right side
   12,649.32x = 197,670,978.71
5. Step 5: Solve for x
   x = 197,670,978.71/12,649.32
6. Step 6: Final answer
   x = 15,627.00