Finding the Fourth Proportional to 13,129, 18,118.18 and 7,540.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,129 : 18,118.18 = 7,540.52 : x
2. Step 2: Convert to fraction form
   13,129/18,118.18 = 7,540.52/x
3. Step 3: Cross multiply
   13,129x = 18,118.18 × 7,540.52
4. Step 4: Simplify right side
   13,129x = 136,620,498.65
5. Step 5: Solve for x
   x = 136,620,498.65/13,129
6. Step 6: Final answer
   x = 10,406.01