Finding the Fourth Proportional to 52,809.31, 72,875.70 and 28,935.46

Step by Step Solution

1. Step 1: Write the proportion equation
   52,809.31 : 72,875.70 = 28,935.46 : x
2. Step 2: Convert to fraction form
   52,809.31/72,875.70 = 28,935.46/x
3. Step 3: Cross multiply
   52,809.31x = 72,875.70 × 28,935.46
4. Step 4: Simplify right side
   52,809.31x = 2,108,691,902.32
5. Step 5: Solve for x
   x = 2,108,691,902.32/52,809.31
6. Step 6: Final answer
   x = 39,930.31