Finding the Fourth Proportional to 52,810.31, 72,879.92 and 28,938.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,810.31 : 72,879.92 = 28,938.50 : x
2. Step 2: Convert to fraction form
   52,810.31/72,879.92 = 28,938.50/x
3. Step 3: Cross multiply
   52,810.31x = 72,879.92 × 28,938.50
4. Step 4: Simplify right side
   52,810.31x = 2,109,035,055.83
5. Step 5: Solve for x
   x = 2,109,035,055.83/52,810.31
6. Step 6: Final answer
   x = 39,936.05