Finding the Fourth Proportional to 1,338.28, 1,846.54 and 918.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.28 : 1,846.54 = 918.47 : x
2. Step 2: Convert to fraction form
   1,338.28/1,846.54 = 918.47/x
3. Step 3: Cross multiply
   1,338.28x = 1,846.54 × 918.47
4. Step 4: Simplify right side
   1,338.28x = 1,696,000.81
5. Step 5: Solve for x
   x = 1,696,000.81/1,338.28
6. Step 6: Final answer
   x = 1,267.30