Finding the Fourth Proportional to 52,551, 72,521.91 and 28,679.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,551 : 72,521.91 = 28,679.20 : x
2. Step 2: Convert to fraction form
   52,551/72,521.91 = 28,679.20/x
3. Step 3: Cross multiply
   52,551x = 72,521.91 × 28,679.20
4. Step 4: Simplify right side
   52,551x = 2,079,870,361.27
5. Step 5: Solve for x
   x = 2,079,870,361.27/52,551
6. Step 6: Final answer
   x = 39,578.13