Finding the Fourth Proportional to 1,309.23, 1,962.22 and 659.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.23 : 1,962.22 = 659.61 : x
2. Step 2: Convert to fraction form
   1,309.23/1,962.22 = 659.61/x
3. Step 3: Cross multiply
   1,309.23x = 1,962.22 × 659.61
4. Step 4: Simplify right side
   1,309.23x = 1,294,288.47
5. Step 5: Solve for x
   x = 1,294,288.47/1,309.23
6. Step 6: Final answer
   x = 988.59