Finding the Fourth Proportional to 30,660.18, 42,312.22 and 17,231.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,660.18 : 42,312.22 = 17,231.18 : x
2. Step 2: Convert to fraction form
   30,660.18/42,312.22 = 17,231.18/x
3. Step 3: Cross multiply
   30,660.18x = 42,312.22 × 17,231.18
4. Step 4: Simplify right side
   30,660.18x = 729,089,479.02
5. Step 5: Solve for x
   x = 729,089,479.02/30,660.18
6. Step 6: Final answer
   x = 23,779.69