Finding the Fourth Proportional to 52,788.32, 72,847.89 and 28,915.85

Step by Step Solution

1. Step 1: Write the proportion equation
   52,788.32 : 72,847.89 = 28,915.85 : x
2. Step 2: Convert to fraction form
   52,788.32/72,847.89 = 28,915.85/x
3. Step 3: Cross multiply
   52,788.32x = 72,847.89 × 28,915.85
4. Step 4: Simplify right side
   52,788.32x = 2,106,458,660.06
5. Step 5: Solve for x
   x = 2,106,458,660.06/52,788.32
6. Step 6: Final answer
   x = 39,903.88