Finding the Fourth Proportional to 13,458.38, 18,572.73 and 7,490.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,458.38 : 18,572.73 = 7,490.12 : x
2. Step 2: Convert to fraction form
   13,458.38/18,572.73 = 7,490.12/x
3. Step 3: Cross multiply
   13,458.38x = 18,572.73 × 7,490.12
4. Step 4: Simplify right side
   13,458.38x = 139,111,976.43
5. Step 5: Solve for x
   x = 139,111,976.43/13,458.38
6. Step 6: Final answer
   x = 10,336.46