Finding the Fourth Proportional to 52,654.15, 72,664.49 and 28,780.31

Step by Step Solution

1. Step 1: Write the proportion equation
   52,654.15 : 72,664.49 = 28,780.31 : x
2. Step 2: Convert to fraction form
   52,654.15/72,664.49 = 28,780.31/x
3. Step 3: Cross multiply
   52,654.15x = 72,664.49 × 28,780.31
4. Step 4: Simplify right side
   52,654.15x = 2,091,306,801.80
5. Step 5: Solve for x
   x = 2,091,306,801.80/52,654.15
6. Step 6: Final answer
   x = 39,717.80