Finding the Fourth Proportional to 1,404.90, 2,108.07 and 993.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.90 : 2,108.07 = 993.15 : x
2. Step 2: Convert to fraction form
   1,404.90/2,108.07 = 993.15/x
3. Step 3: Cross multiply
   1,404.90x = 2,108.07 × 993.15
4. Step 4: Simplify right side
   1,404.90x = 2,093,629.72
5. Step 5: Solve for x
   x = 2,093,629.72/1,404.90
6. Step 6: Final answer
   x = 1,490.23