Finding the Fourth Proportional to 2,097.90, 3,144.72 and 710.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.90 : 3,144.72 = 710.78 : x
2. Step 2: Convert to fraction form
   2,097.90/3,144.72 = 710.78/x
3. Step 3: Cross multiply
   2,097.90x = 3,144.72 × 710.78
4. Step 4: Simplify right side
   2,097.90x = 2,235,191.02
5. Step 5: Solve for x
   x = 2,235,191.02/2,097.90
6. Step 6: Final answer
   x = 1,065.44