Finding the Fourth Proportional to 13,468.20, 18,585.63 and 7,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,468.20 : 18,585.63 = 7,499.72 : x
2. Step 2: Convert to fraction form
   13,468.20/18,585.63 = 7,499.72/x
3. Step 3: Cross multiply
   13,468.20x = 18,585.63 × 7,499.72
4. Step 4: Simplify right side
   13,468.20x = 139,386,928.10
5. Step 5: Solve for x
   x = 139,386,928.10/13,468.20
6. Step 6: Final answer
   x = 10,349.34