Finding the Fourth Proportional to 1,103.80, 1,522.90 and 710.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.80 : 1,522.90 = 710.12 : x
2. Step 2: Convert to fraction form
   1,103.80/1,522.90 = 710.12/x
3. Step 3: Cross multiply
   1,103.80x = 1,522.90 × 710.12
4. Step 4: Simplify right side
   1,103.80x = 1,081,441.75
5. Step 5: Solve for x
   x = 1,081,441.75/1,103.80
6. Step 6: Final answer
   x = 979.74