Finding the Fourth Proportional to 13,426.50, 18,528.82 and 7,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.50 : 18,528.82 = 7,458.72 : x
2. Step 2: Convert to fraction form
   13,426.50/18,528.82 = 7,458.72/x
3. Step 3: Cross multiply
   13,426.50x = 18,528.82 × 7,458.72
4. Step 4: Simplify right side
   13,426.50x = 138,201,280.31
5. Step 5: Solve for x
   x = 138,201,280.31/13,426.50
6. Step 6: Final answer
   x = 10,293.17