Finding the Fourth Proportional to 30,725.66, 42,407.01 and 17,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,725.66 : 42,407.01 = 17,978.10 : x
2. Step 2: Convert to fraction form
   30,725.66/42,407.01 = 17,978.10/x
3. Step 3: Cross multiply
   30,725.66x = 42,407.01 × 17,978.10
4. Step 4: Simplify right side
   30,725.66x = 762,397,466.48
5. Step 5: Solve for x
   x = 762,397,466.48/30,725.66
6. Step 6: Final answer
   x = 24,813.06