Finding the Fourth Proportional to 30,951, 42,712.88 and 17,521.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,951 : 42,712.88 = 17,521.91 : x
2. Step 2: Convert to fraction form
   30,951/42,712.88 = 17,521.91/x
3. Step 3: Cross multiply
   30,951x = 42,712.88 × 17,521.91
4. Step 4: Simplify right side
   30,951x = 748,411,239.20
5. Step 5: Solve for x
   x = 748,411,239.20/30,951
6. Step 6: Final answer
   x = 24,180.52