Finding the Fourth Proportional to 2,131.08, 3,196.20 and 670.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.08 : 3,196.20 = 670.32 : x
2. Step 2: Convert to fraction form
   2,131.08/3,196.20 = 670.32/x
3. Step 3: Cross multiply
   2,131.08x = 3,196.20 × 670.32
4. Step 4: Simplify right side
   2,131.08x = 2,142,476.78
5. Step 5: Solve for x
   x = 2,142,476.78/2,131.08
6. Step 6: Final answer
   x = 1,005.35