Finding the Fourth Proportional to 30,738.50, 42,418.70 and 17,309.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,738.50 : 42,418.70 = 17,309.91 : x
2. Step 2: Convert to fraction form
   30,738.50/42,418.70 = 17,309.91/x
3. Step 3: Cross multiply
   30,738.50x = 42,418.70 × 17,309.91
4. Step 4: Simplify right side
   30,738.50x = 734,263,879.32
5. Step 5: Solve for x
   x = 734,263,879.32/30,738.50
6. Step 6: Final answer
   x = 23,887.44