Finding the Fourth Proportional to 52,808.30, 72,877.15 and 28,936.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,808.30 : 72,877.15 = 28,936.50 : x
2. Step 2: Convert to fraction form
   52,808.30/72,877.15 = 28,936.50/x
3. Step 3: Cross multiply
   52,808.30x = 72,877.15 × 28,936.50
4. Step 4: Simplify right side
   52,808.30x = 2,108,809,650.98
5. Step 5: Solve for x
   x = 2,108,809,650.98/52,808.30
6. Step 6: Final answer
   x = 39,933.30