Finding the Fourth Proportional to 55,789.54, 76,987.74 and 39,900.58

Step by Step Solution

1. Step 1: Write the proportion equation
   55,789.54 : 76,987.74 = 39,900.58 : x
2. Step 2: Convert to fraction form
   55,789.54/76,987.74 = 39,900.58/x
3. Step 3: Cross multiply
   55,789.54x = 76,987.74 × 39,900.58
4. Step 4: Simplify right side
   55,789.54x = 3,071,855,478.89
5. Step 5: Solve for x
   x = 3,071,855,478.89/55,789.54
6. Step 6: Final answer
   x = 55,061.50