Finding the Fourth Proportional to 1,150.90, 1,587.58 and 708.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.90 : 1,587.58 = 708.49 : x
2. Step 2: Convert to fraction form
   1,150.90/1,587.58 = 708.49/x
3. Step 3: Cross multiply
   1,150.90x = 1,587.58 × 708.49
4. Step 4: Simplify right side
   1,150.90x = 1,124,779.82
5. Step 5: Solve for x
   x = 1,124,779.82/1,150.90
6. Step 6: Final answer
   x = 977.31