Finding the Fourth Proportional to 30,779.98, 42,472.28 and 17,351.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,779.98 : 42,472.28 = 17,351.80 : x
2. Step 2: Convert to fraction form
   30,779.98/42,472.28 = 17,351.80/x
3. Step 3: Cross multiply
   30,779.98x = 42,472.28 × 17,351.80
4. Step 4: Simplify right side
   30,779.98x = 736,970,508.10
5. Step 5: Solve for x
   x = 736,970,508.10/30,779.98
6. Step 6: Final answer
   x = 23,943.18