Finding the Fourth Proportional to 8,127.31, 12,189.71 and 2,579.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.31 : 12,189.71 = 2,579.93 : x
2. Step 2: Convert to fraction form
   8,127.31/12,189.71 = 2,579.93/x
3. Step 3: Cross multiply
   8,127.31x = 12,189.71 × 2,579.93
4. Step 4: Simplify right side
   8,127.31x = 31,448,598.52
5. Step 5: Solve for x
   x = 31,448,598.52/8,127.31
6. Step 6: Final answer
   x = 3,869.50