Finding the Fourth Proportional to 13,459.32, 18,573.72 and 7,490.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,459.32 : 18,573.72 = 7,490.90 : x
2. Step 2: Convert to fraction form
   13,459.32/18,573.72 = 7,490.90/x
3. Step 3: Cross multiply
   13,459.32x = 18,573.72 × 7,490.90
4. Step 4: Simplify right side
   13,459.32x = 139,133,879.15
5. Step 5: Solve for x
   x = 139,133,879.15/13,459.32
6. Step 6: Final answer
   x = 10,337.36