Finding the Fourth Proportional to 13,510.42, 18,646.25 and 7,542.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510.42 : 18,646.25 = 7,542.47 : x
2. Step 2: Convert to fraction form
   13,510.42/18,646.25 = 7,542.47/x
3. Step 3: Cross multiply
   13,510.42x = 18,646.25 × 7,542.47
4. Step 4: Simplify right side
   13,510.42x = 140,638,790.14
5. Step 5: Solve for x
   x = 140,638,790.14/13,510.42
6. Step 6: Final answer
   x = 10,409.66