Finding the Fourth Proportional to 28,613.30, 39,478.52 and 17,123.58

Step by Step Solution

1. Step 1: Write the proportion equation
   28,613.30 : 39,478.52 = 17,123.58 : x
2. Step 2: Convert to fraction form
   28,613.30/39,478.52 = 17,123.58/x
3. Step 3: Cross multiply
   28,613.30x = 39,478.52 × 17,123.58
4. Step 4: Simplify right side
   28,613.30x = 676,013,595.50
5. Step 5: Solve for x
   x = 676,013,595.50/28,613.30
6. Step 6: Final answer
   x = 23,625.85