Finding the Fourth Proportional to 13,426.38, 18,528.42 and 7,458.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.38 : 18,528.42 = 7,458.61 : x
2. Step 2: Convert to fraction form
   13,426.38/18,528.42 = 7,458.61/x
3. Step 3: Cross multiply
   13,426.38x = 18,528.42 × 7,458.61
4. Step 4: Simplify right side
   13,426.38x = 138,196,202.00
5. Step 5: Solve for x
   x = 138,196,202.00/13,426.38
6. Step 6: Final answer
   x = 10,292.88