Finding the Fourth Proportional to 8,780.98, 12,127.73 and 5,904.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.98 : 12,127.73 = 5,904.71 : x
2. Step 2: Convert to fraction form
   8,780.98/12,127.73 = 5,904.71/x
3. Step 3: Cross multiply
   8,780.98x = 12,127.73 × 5,904.71
4. Step 4: Simplify right side
   8,780.98x = 71,610,682.73
5. Step 5: Solve for x
   x = 71,610,682.73/8,780.98
6. Step 6: Final answer
   x = 8,155.21