Finding the Fourth Proportional to 30,499.68, 42,089.77 and 17,072.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,499.68 : 42,089.77 = 17,072.18 : x
2. Step 2: Convert to fraction form
   30,499.68/42,089.77 = 17,072.18/x
3. Step 3: Cross multiply
   30,499.68x = 42,089.77 × 17,072.18
4. Step 4: Simplify right side
   30,499.68x = 718,563,833.79
5. Step 5: Solve for x
   x = 718,563,833.79/30,499.68
6. Step 6: Final answer
   x = 23,559.72