Finding the Fourth Proportional to 12,543.50, 17,303.88 and 10,553.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,543.50 : 17,303.88 = 10,553.30 : x
2. Step 2: Convert to fraction form
   12,543.50/17,303.88 = 10,553.30/x
3. Step 3: Cross multiply
   12,543.50x = 17,303.88 × 10,553.30
4. Step 4: Simplify right side
   12,543.50x = 182,613,036.80
5. Step 5: Solve for x
   x = 182,613,036.80/12,543.50
6. Step 6: Final answer
   x = 14,558.38