Finding the Fourth Proportional to 2,127.89, 3,192.37 and 667.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.89 : 3,192.37 = 667.05 : x
2. Step 2: Convert to fraction form
   2,127.89/3,192.37 = 667.05/x
3. Step 3: Cross multiply
   2,127.89x = 3,192.37 × 667.05
4. Step 4: Simplify right side
   2,127.89x = 2,129,470.41
5. Step 5: Solve for x
   x = 2,129,470.41/2,127.89
6. Step 6: Final answer
   x = 1,000.74