Finding the Fourth Proportional to 1,404.59, 1,938.27 and 815.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.59 : 1,938.27 = 815.00 : x
2. Step 2: Convert to fraction form
   1,404.59/1,938.27 = 815.00/x
3. Step 3: Cross multiply
   1,404.59x = 1,938.27 × 815.00
4. Step 4: Simplify right side
   1,404.59x = 1,579,680.36
5. Step 5: Solve for x
   x = 1,579,680.36/1,404.59
6. Step 6: Final answer
   x = 1,124.66