Finding the Fourth Proportional to 30,778.98, 42,470.89 and 17,350.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,778.98 : 42,470.89 = 17,350.80 : x
2. Step 2: Convert to fraction form
   30,778.98/42,470.89 = 17,350.80/x
3. Step 3: Cross multiply
   30,778.98x = 42,470.89 × 17,350.80
4. Step 4: Simplify right side
   30,778.98x = 736,903,918.21
5. Step 5: Solve for x
   x = 736,903,918.21/30,778.98
6. Step 6: Final answer
   x = 23,941.79