Finding the Fourth Proportional to 2,128.48, 3,192.82 and 667.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.48 : 3,192.82 = 667.71 : x
2. Step 2: Convert to fraction form
   2,128.48/3,192.82 = 667.71/x
3. Step 3: Cross multiply
   2,128.48x = 3,192.82 × 667.71
4. Step 4: Simplify right side
   2,128.48x = 2,131,876.17
5. Step 5: Solve for x
   x = 2,131,876.17/2,128.48
6. Step 6: Final answer
   x = 1,001.60