Finding the Fourth Proportional to 12,402.68, 18,585.12 and 7,466.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.68 : 18,585.12 = 7,466.72 : x
2. Step 2: Convert to fraction form
   12,402.68/18,585.12 = 7,466.72/x
3. Step 3: Cross multiply
   12,402.68x = 18,585.12 × 7,466.72
4. Step 4: Simplify right side
   12,402.68x = 138,769,887.21
5. Step 5: Solve for x
   x = 138,769,887.21/12,402.68
6. Step 6: Final answer
   x = 11,188.70