Finding the Fourth Proportional to 30,641.71, 42,279 and 17,889.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,641.71 : 42,279 = 17,889.12 : x
2. Step 2: Convert to fraction form
   30,641.71/42,279 = 17,889.12/x
3. Step 3: Cross multiply
   30,641.71x = 42,279 × 17,889.12
4. Step 4: Simplify right side
   30,641.71x = 756,334,104.48
5. Step 5: Solve for x
   x = 756,334,104.48/30,641.71
6. Step 6: Final answer
   x = 24,683.16