Finding the Fourth Proportional to 13,436.72, 18,542.00 and 7,468.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,436.72 : 18,542.00 = 7,468.78 : x
2. Step 2: Convert to fraction form
   13,436.72/18,542.00 = 7,468.78/x
3. Step 3: Cross multiply
   13,436.72x = 18,542.00 × 7,468.78
4. Step 4: Simplify right side
   13,436.72x = 138,486,050.15
5. Step 5: Solve for x
   x = 138,486,050.15/13,436.72
6. Step 6: Final answer
   x = 10,306.53