Finding the Fourth Proportional to 13,458.14, 18,572.61 and 7,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,458.14 : 18,572.61 = 7,490.42 : x
2. Step 2: Convert to fraction form
   13,458.14/18,572.61 = 7,490.42/x
3. Step 3: Cross multiply
   13,458.14x = 18,572.61 × 7,490.42
4. Step 4: Simplify right side
   13,458.14x = 139,116,649.40
5. Step 5: Solve for x
   x = 139,116,649.40/13,458.14
6. Step 6: Final answer
   x = 10,336.99