Finding the Fourth Proportional to 12,806.20, 17,672.58 and 7,499.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.20 : 17,672.58 = 7,499.96 : x
2. Step 2: Convert to fraction form
   12,806.20/17,672.58 = 7,499.96/x
3. Step 3: Cross multiply
   12,806.20x = 17,672.58 × 7,499.96
4. Step 4: Simplify right side
   12,806.20x = 132,543,643.10
5. Step 5: Solve for x
   x = 132,543,643.10/12,806.20
6. Step 6: Final answer
   x = 10,349.96