Finding the Fourth Proportional to 1,445.67, 1,994.83 and 816.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.67 : 1,994.83 = 816.17 : x
2. Step 2: Convert to fraction form
   1,445.67/1,994.83 = 816.17/x
3. Step 3: Cross multiply
   1,445.67x = 1,994.83 × 816.17
4. Step 4: Simplify right side
   1,445.67x = 1,628,108.39
5. Step 5: Solve for x
   x = 1,628,108.39/1,445.67
6. Step 6: Final answer
   x = 1,126.20