Finding the Fourth Proportional to 1,307.73, 1,805.50 and 1,009.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307.73 : 1,805.50 = 1,009.61 : x
2. Step 2: Convert to fraction form
   1,307.73/1,805.50 = 1,009.61/x
3. Step 3: Cross multiply
   1,307.73x = 1,805.50 × 1,009.61
4. Step 4: Simplify right side
   1,307.73x = 1,822,850.86
5. Step 5: Solve for x
   x = 1,822,850.86/1,307.73
6. Step 6: Final answer
   x = 1,393.90