Finding the Fourth Proportional to 1,662.86, 2,294.26 and 999.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.86 : 2,294.26 = 999.47 : x
2. Step 2: Convert to fraction form
   1,662.86/2,294.26 = 999.47/x
3. Step 3: Cross multiply
   1,662.86x = 2,294.26 × 999.47
4. Step 4: Simplify right side
   1,662.86x = 2,293,047.28
5. Step 5: Solve for x
   x = 2,293,047.28/1,662.86
6. Step 6: Final answer
   x = 1,378.98