Finding the Fourth Proportional to 13,513.74, 18,648.78 and 7,545.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,513.74 : 18,648.78 = 7,545.51 : x
2. Step 2: Convert to fraction form
   13,513.74/18,648.78 = 7,545.51/x
3. Step 3: Cross multiply
   13,513.74x = 18,648.78 × 7,545.51
4. Step 4: Simplify right side
   13,513.74x = 140,714,555.98
5. Step 5: Solve for x
   x = 140,714,555.98/13,513.74
6. Step 6: Final answer
   x = 10,412.70