Finding the Fourth Proportional to 1,078.29, 1,488.15 and 706.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.29 : 1,488.15 = 706.32 : x
2. Step 2: Convert to fraction form
   1,078.29/1,488.15 = 706.32/x
3. Step 3: Cross multiply
   1,078.29x = 1,488.15 × 706.32
4. Step 4: Simplify right side
   1,078.29x = 1,051,110.11
5. Step 5: Solve for x
   x = 1,051,110.11/1,078.29
6. Step 6: Final answer
   x = 974.79