Finding the Fourth Proportional to 13,436.48, 18,542.42 and 7,468.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,436.48 : 18,542.42 = 7,468.71 : x
2. Step 2: Convert to fraction form
   13,436.48/18,542.42 = 7,468.71/x
3. Step 3: Cross multiply
   13,436.48x = 18,542.42 × 7,468.71
4. Step 4: Simplify right side
   13,436.48x = 138,487,878.81
5. Step 5: Solve for x
   x = 138,487,878.81/13,436.48
6. Step 6: Final answer
   x = 10,306.86