Finding the Fourth Proportional to 13,426.90, 18,528.88 and 7,458.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.90 : 18,528.88 = 7,458.42 : x
2. Step 2: Convert to fraction form
   13,426.90/18,528.88 = 7,458.42/x
3. Step 3: Cross multiply
   13,426.90x = 18,528.88 × 7,458.42
4. Step 4: Simplify right side
   13,426.90x = 138,196,169.17
5. Step 5: Solve for x
   x = 138,196,169.17/13,426.90
6. Step 6: Final answer
   x = 10,292.49