Finding the Fourth Proportional to 30,445.70, 42,018.09 and 17,870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,445.70 : 42,018.09 = 17,870.18 : x
2. Step 2: Convert to fraction form
   30,445.70/42,018.09 = 17,870.18/x
3. Step 3: Cross multiply
   30,445.70x = 42,018.09 × 17,870.18
4. Step 4: Simplify right side
   30,445.70x = 750,870,831.56
5. Step 5: Solve for x
   x = 750,870,831.56/30,445.70
6. Step 6: Final answer
   x = 24,662.62