Finding the Fourth Proportional to 30,978.64, 42,749.13 and 17,549.62

Step by Step Solution

1. Step 1: Write the proportion equation
   30,978.64 : 42,749.13 = 17,549.62 : x
2. Step 2: Convert to fraction form
   30,978.64/42,749.13 = 17,549.62/x
3. Step 3: Cross multiply
   30,978.64x = 42,749.13 × 17,549.62
4. Step 4: Simplify right side
   30,978.64x = 750,230,986.83
5. Step 5: Solve for x
   x = 750,230,986.83/30,978.64
6. Step 6: Final answer
   x = 24,217.69