Finding the Fourth Proportional to 1,209.56, 1,668.98 and 705.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.56 : 1,668.98 = 705.52 : x
2. Step 2: Convert to fraction form
   1,209.56/1,668.98 = 705.52/x
3. Step 3: Cross multiply
   1,209.56x = 1,668.98 × 705.52
4. Step 4: Simplify right side
   1,209.56x = 1,177,498.77
5. Step 5: Solve for x
   x = 1,177,498.77/1,209.56
6. Step 6: Final answer
   x = 973.49