Finding the Fourth Proportional to 51,200.61, 70,654.59 and 28,542.09

Step by Step Solution

1. Step 1: Write the proportion equation
   51,200.61 : 70,654.59 = 28,542.09 : x
2. Step 2: Convert to fraction form
   51,200.61/70,654.59 = 28,542.09/x
3. Step 3: Cross multiply
   51,200.61x = 70,654.59 × 28,542.09
4. Step 4: Simplify right side
   51,200.61x = 2,016,629,666.69
5. Step 5: Solve for x
   x = 2,016,629,666.69/51,200.61
6. Step 6: Final answer
   x = 39,386.83