Finding the Fourth Proportional to 13,352.47, 18,426.39 and 7,685.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,352.47 : 18,426.39 = 7,685.16 : x
2. Step 2: Convert to fraction form
   13,352.47/18,426.39 = 7,685.16/x
3. Step 3: Cross multiply
   13,352.47x = 18,426.39 × 7,685.16
4. Step 4: Simplify right side
   13,352.47x = 141,609,657.45
5. Step 5: Solve for x
   x = 141,609,657.45/13,352.47
6. Step 6: Final answer
   x = 10,605.50