Finding the Fourth Proportional to 52,578.90, 72,559.98 and 28,706.58

Step by Step Solution

1. Step 1: Write the proportion equation
   52,578.90 : 72,559.98 = 28,706.58 : x
2. Step 2: Convert to fraction form
   52,578.90/72,559.98 = 28,706.58/x
3. Step 3: Cross multiply
   52,578.90x = 72,559.98 × 28,706.58
4. Step 4: Simplify right side
   52,578.90x = 2,082,948,870.67
5. Step 5: Solve for x
   x = 2,082,948,870.67/52,578.90
6. Step 6: Final answer
   x = 39,615.68