Finding the Fourth Proportional to 1,100.84, 1,520.18 and 708.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.84 : 1,520.18 = 708.56 : x
2. Step 2: Convert to fraction form
   1,100.84/1,520.18 = 708.56/x
3. Step 3: Cross multiply
   1,100.84x = 1,520.18 × 708.56
4. Step 4: Simplify right side
   1,100.84x = 1,077,132.91
5. Step 5: Solve for x
   x = 1,077,132.91/1,100.84
6. Step 6: Final answer
   x = 978.46