Finding the Fourth Proportional to 1,103.45, 1,521.97 and 710.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.45 : 1,521.97 = 710.10 : x
2. Step 2: Convert to fraction form
   1,103.45/1,521.97 = 710.10/x
3. Step 3: Cross multiply
   1,103.45x = 1,521.97 × 710.10
4. Step 4: Simplify right side
   1,103.45x = 1,080,743.29
5. Step 5: Solve for x
   x = 1,080,743.29/1,103.45
6. Step 6: Final answer
   x = 979.42