Finding the Fourth Proportional to 1,447.95, 1,998.17 and 784.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.95 : 1,998.17 = 784.80 : x
2. Step 2: Convert to fraction form
   1,447.95/1,998.17 = 784.80/x
3. Step 3: Cross multiply
   1,447.95x = 1,998.17 × 784.80
4. Step 4: Simplify right side
   1,447.95x = 1,568,164.89
5. Step 5: Solve for x
   x = 1,568,164.89/1,447.95
6. Step 6: Final answer
   x = 1,083.03