Finding the Fourth Proportional to 2,130.89, 3,196.79 and 670.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.89 : 3,196.79 = 670.16 : x
2. Step 2: Convert to fraction form
   2,130.89/3,196.79 = 670.16/x
3. Step 3: Cross multiply
   2,130.89x = 3,196.79 × 670.16
4. Step 4: Simplify right side
   2,130.89x = 2,142,343.96
5. Step 5: Solve for x
   x = 2,142,343.96/2,130.89
6. Step 6: Final answer
   x = 1,005.38