Finding the Fourth Proportional to 13,513.48, 18,646.86 and 7,545.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,513.48 : 18,646.86 = 7,545.40 : x
2. Step 2: Convert to fraction form
   13,513.48/18,646.86 = 7,545.40/x
3. Step 3: Cross multiply
   13,513.48x = 18,646.86 × 7,545.40
4. Step 4: Simplify right side
   13,513.48x = 140,698,061.57
5. Step 5: Solve for x
   x = 140,698,061.57/13,513.48
6. Step 6: Final answer
   x = 10,411.68