Finding the Fourth Proportional to 13,499.16, 18,626.64 and 7,530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.16 : 18,626.64 = 7,530.72 : x
2. Step 2: Convert to fraction form
   13,499.16/18,626.64 = 7,530.72/x
3. Step 3: Cross multiply
   13,499.16x = 18,626.64 × 7,530.72
4. Step 4: Simplify right side
   13,499.16x = 140,272,010.38
5. Step 5: Solve for x
   x = 140,272,010.38/13,499.16
6. Step 6: Final answer
   x = 10,391.17