Finding the Fourth Proportional to 1,447.13, 1,997.03 and 783.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.13 : 1,997.03 = 783.99 : x
2. Step 2: Convert to fraction form
   1,447.13/1,997.03 = 783.99/x
3. Step 3: Cross multiply
   1,447.13x = 1,997.03 × 783.99
4. Step 4: Simplify right side
   1,447.13x = 1,565,653.51
5. Step 5: Solve for x
   x = 1,565,653.51/1,447.13
6. Step 6: Final answer
   x = 1,081.90