Finding the Fourth Proportional to 30,719.43, 42,392.88 and 17,290.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,719.43 : 42,392.88 = 17,290.87 : x
2. Step 2: Convert to fraction form
   30,719.43/42,392.88 = 17,290.87/x
3. Step 3: Cross multiply
   30,719.43x = 42,392.88 × 17,290.87
4. Step 4: Simplify right side
   30,719.43x = 733,009,777.01
5. Step 5: Solve for x
   x = 733,009,777.01/30,719.43
6. Step 6: Final answer
   x = 23,861.44