Finding the Fourth Proportional to 2,130.85, 3,196.78 and 670.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.85 : 3,196.78 = 670.01 : x
2. Step 2: Convert to fraction form
   2,130.85/3,196.78 = 670.01/x
3. Step 3: Cross multiply
   2,130.85x = 3,196.78 × 670.01
4. Step 4: Simplify right side
   2,130.85x = 2,141,864.28
5. Step 5: Solve for x
   x = 2,141,864.28/2,130.85
6. Step 6: Final answer
   x = 1,005.17