Finding the Fourth Proportional to 1,447.71, 2,172.42 and 789.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.71 : 2,172.42 = 789.59 : x
2. Step 2: Convert to fraction form
   1,447.71/2,172.42 = 789.59/x
3. Step 3: Cross multiply
   1,447.71x = 2,172.42 × 789.59
4. Step 4: Simplify right side
   1,447.71x = 1,715,310.25
5. Step 5: Solve for x
   x = 1,715,310.25/1,447.71
6. Step 6: Final answer
   x = 1,184.84