Finding the Fourth Proportional to 13,426.86, 18,528.69 and 7,458.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.86 : 18,528.69 = 7,458.42 : x
2. Step 2: Convert to fraction form
   13,426.86/18,528.69 = 7,458.42/x
3. Step 3: Cross multiply
   13,426.86x = 18,528.69 × 7,458.42
4. Step 4: Simplify right side
   13,426.86x = 138,194,752.07
5. Step 5: Solve for x
   x = 138,194,752.07/13,426.86
6. Step 6: Final answer
   x = 10,292.41