Finding the Fourth Proportional to 52,779.25, 72,836.16 and 28,908.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52,779.25 : 72,836.16 = 28,908.15 : x
2. Step 2: Convert to fraction form
   52,779.25/72,836.16 = 28,908.15/x
3. Step 3: Cross multiply
   52,779.25x = 72,836.16 × 28,908.15
4. Step 4: Simplify right side
   52,779.25x = 2,105,558,494.16
5. Step 5: Solve for x
   x = 2,105,558,494.16/52,779.25
6. Step 6: Final answer
   x = 39,893.68