Finding the Fourth Proportional to 1,662.50, 2,294.16 and 999.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.50 : 2,294.16 = 999.23 : x
2. Step 2: Convert to fraction form
   1,662.50/2,294.16 = 999.23/x
3. Step 3: Cross multiply
   1,662.50x = 2,294.16 × 999.23
4. Step 4: Simplify right side
   1,662.50x = 2,292,393.50
5. Step 5: Solve for x
   x = 2,292,393.50/1,662.50
6. Step 6: Final answer
   x = 1,378.88