Finding the Fourth Proportional to 1,581.86, 2,184.37 and 993.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.86 : 2,184.37 = 993.38 : x
2. Step 2: Convert to fraction form
   1,581.86/2,184.37 = 993.38/x
3. Step 3: Cross multiply
   1,581.86x = 2,184.37 × 993.38
4. Step 4: Simplify right side
   1,581.86x = 2,169,909.47
5. Step 5: Solve for x
   x = 2,169,909.47/1,581.86
6. Step 6: Final answer
   x = 1,371.75