Finding the Fourth Proportional to 30,719.39, 42,391.15 and 17,291.21

Step by Step Solution

1. Step 1: Write the proportion equation
   30,719.39 : 42,391.15 = 17,291.21 : x
2. Step 2: Convert to fraction form
   30,719.39/42,391.15 = 17,291.21/x
3. Step 3: Cross multiply
   30,719.39x = 42,391.15 × 17,291.21
4. Step 4: Simplify right side
   30,719.39x = 732,994,021.61
5. Step 5: Solve for x
   x = 732,994,021.61/30,719.39
6. Step 6: Final answer
   x = 23,860.96