Finding the Fourth Proportional to 1,892.90, 2,838.72 and 918.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.90 : 2,838.72 = 918.38 : x
2. Step 2: Convert to fraction form
   1,892.90/2,838.72 = 918.38/x
3. Step 3: Cross multiply
   1,892.90x = 2,838.72 × 918.38
4. Step 4: Simplify right side
   1,892.90x = 2,607,023.67
5. Step 5: Solve for x
   x = 2,607,023.67/1,892.90
6. Step 6: Final answer
   x = 1,377.26