Finding the Fourth Proportional to 2,128.09, 3,192.43 and 667.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.09 : 3,192.43 = 667.35 : x
2. Step 2: Convert to fraction form
   2,128.09/3,192.43 = 667.35/x
3. Step 3: Cross multiply
   2,128.09x = 3,192.43 × 667.35
4. Step 4: Simplify right side
   2,128.09x = 2,130,468.16
5. Step 5: Solve for x
   x = 2,130,468.16/2,128.09
6. Step 6: Final answer
   x = 1,001.12