Finding the Fourth Proportional to 1,233.61, 1,702.53 and 709.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.61 : 1,702.53 = 709.63 : x
2. Step 2: Convert to fraction form
   1,233.61/1,702.53 = 709.63/x
3. Step 3: Cross multiply
   1,233.61x = 1,702.53 × 709.63
4. Step 4: Simplify right side
   1,233.61x = 1,208,154.30
5. Step 5: Solve for x
   x = 1,208,154.30/1,233.61
6. Step 6: Final answer
   x = 979.37