Finding the Fourth Proportional to 1,404.74, 1,938.08 and 815.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.74 : 1,938.08 = 815.06 : x
2. Step 2: Convert to fraction form
   1,404.74/1,938.08 = 815.06/x
3. Step 3: Cross multiply
   1,404.74x = 1,938.08 × 815.06
4. Step 4: Simplify right side
   1,404.74x = 1,579,637.72
5. Step 5: Solve for x
   x = 1,579,637.72/1,404.74
6. Step 6: Final answer
   x = 1,124.51