Finding the Fourth Proportional to 13,499.57, 18,629.46 and 7,531.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.57 : 18,629.46 = 7,531.49 : x
2. Step 2: Convert to fraction form
   13,499.57/18,629.46 = 7,531.49/x
3. Step 3: Cross multiply
   13,499.57x = 18,629.46 × 7,531.49
4. Step 4: Simplify right side
   13,499.57x = 140,307,498.55
5. Step 5: Solve for x
   x = 140,307,498.55/13,499.57
6. Step 6: Final answer
   x = 10,393.48