Finding the Fourth Proportional to 1,101.42, 1,519.56 and 708.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.42 : 1,519.56 = 708.30 : x
2. Step 2: Convert to fraction form
   1,101.42/1,519.56 = 708.30/x
3. Step 3: Cross multiply
   1,101.42x = 1,519.56 × 708.30
4. Step 4: Simplify right side
   1,101.42x = 1,076,304.35
5. Step 5: Solve for x
   x = 1,076,304.35/1,101.42
6. Step 6: Final answer
   x = 977.20