Finding the Fourth Proportional to 30,612.96, 42,246.62 and 17,185.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,612.96 : 42,246.62 = 17,185.20 : x
2. Step 2: Convert to fraction form
   30,612.96/42,246.62 = 17,185.20/x
3. Step 3: Cross multiply
   30,612.96x = 42,246.62 × 17,185.20
4. Step 4: Simplify right side
   30,612.96x = 726,016,614.02
5. Step 5: Solve for x
   x = 726,016,614.02/30,612.96
6. Step 6: Final answer
   x = 23,715.99