Finding the Fourth Proportional to 13,196.43, 18,210.60 and 7,531.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.43 : 18,210.60 = 7,531.47 : x
2. Step 2: Convert to fraction form
   13,196.43/18,210.60 = 7,531.47/x
3. Step 3: Cross multiply
   13,196.43x = 18,210.60 × 7,531.47
4. Step 4: Simplify right side
   13,196.43x = 137,152,587.58
5. Step 5: Solve for x
   x = 137,152,587.58/13,196.43
6. Step 6: Final answer
   x = 10,393.16