Finding the Fourth Proportional to 1,445.43, 1,994.70 and 815.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.43 : 1,994.70 = 815.98 : x
2. Step 2: Convert to fraction form
   1,445.43/1,994.70 = 815.98/x
3. Step 3: Cross multiply
   1,445.43x = 1,994.70 × 815.98
4. Step 4: Simplify right side
   1,445.43x = 1,627,633.72
5. Step 5: Solve for x
   x = 1,627,633.72/1,445.43
6. Step 6: Final answer
   x = 1,126.06