Finding the Fourth Proportional to 1,439.46, 2,157.82 and 918.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.46 : 2,157.82 = 918.00 : x
2. Step 2: Convert to fraction form
   1,439.46/2,157.82 = 918.00/x
3. Step 3: Cross multiply
   1,439.46x = 2,157.82 × 918.00
4. Step 4: Simplify right side
   1,439.46x = 1,980,863.38
5. Step 5: Solve for x
   x = 1,980,863.38/1,439.46
6. Step 6: Final answer
   x = 1,376.12