Finding the Fourth Proportional to 39,768.72, 59,499 and 28,700.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,768.72 : 59,499 = 28,700.88 : x
2. Step 2: Convert to fraction form
   39,768.72/59,499 = 28,700.88/x
3. Step 3: Cross multiply
   39,768.72x = 59,499 × 28,700.88
4. Step 4: Simplify right side
   39,768.72x = 1,707,673,659.12
5. Step 5: Solve for x
   x = 1,707,673,659.12/39,768.72
6. Step 6: Final answer
   x = 42,940.12