Finding the Fourth Proportional to 1,662.74, 2,294.78 and 999.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.74 : 2,294.78 = 999.93 : x
2. Step 2: Convert to fraction form
   1,662.74/2,294.78 = 999.93/x
3. Step 3: Cross multiply
   1,662.74x = 2,294.78 × 999.93
4. Step 4: Simplify right side
   1,662.74x = 2,294,619.37
5. Step 5: Solve for x
   x = 2,294,619.37/1,662.74
6. Step 6: Final answer
   x = 1,380.02