Finding the Fourth Proportional to 52,648.50, 72,654.99 and 28,775.21

Step by Step Solution

1. Step 1: Write the proportion equation
   52,648.50 : 72,654.99 = 28,775.21 : x
2. Step 2: Convert to fraction form
   52,648.50/72,654.99 = 28,775.21/x
3. Step 3: Cross multiply
   52,648.50x = 72,654.99 × 28,775.21
4. Step 4: Simplify right side
   52,648.50x = 2,090,662,231.52
5. Step 5: Solve for x
   x = 2,090,662,231.52/52,648.50
6. Step 6: Final answer
   x = 39,709.82