Finding the Fourth Proportional to 52,764.78, 72,815.34 and 28,891.92

Step by Step Solution

1. Step 1: Write the proportion equation
   52,764.78 : 72,815.34 = 28,891.92 : x
2. Step 2: Convert to fraction form
   52,764.78/72,815.34 = 28,891.92/x
3. Step 3: Cross multiply
   52,764.78x = 72,815.34 × 28,891.92
4. Step 4: Simplify right side
   52,764.78x = 2,103,774,978.05
5. Step 5: Solve for x
   x = 2,103,774,978.05/52,764.78
6. Step 6: Final answer
   x = 39,870.82