Finding the Fourth Proportional to 52,559.40, 78,839.70 and 17,499

Step by Step Solution

1. Step 1: Write the proportion equation
   52,559.40 : 78,839.70 = 17,499 : x
2. Step 2: Convert to fraction form
   52,559.40/78,839.70 = 17,499/x
3. Step 3: Cross multiply
   52,559.40x = 78,839.70 × 17,499
4. Step 4: Simplify right side
   52,559.40x = 1,379,615,910.30
5. Step 5: Solve for x
   x = 1,379,615,910.30/52,559.40
6. Step 6: Final answer
   x = 26,248.70