Finding the Fourth Proportional to 30,905.83, 42,648.25 and 17,479.90

Step by Step Solution

1. Step 1: Write the proportion equation
   30,905.83 : 42,648.25 = 17,479.90 : x
2. Step 2: Convert to fraction form
   30,905.83/42,648.25 = 17,479.90/x
3. Step 3: Cross multiply
   30,905.83x = 42,648.25 × 17,479.90
4. Step 4: Simplify right side
   30,905.83x = 745,487,145.18
5. Step 5: Solve for x
   x = 745,487,145.18/30,905.83
6. Step 6: Final answer
   x = 24,121.25