Finding the Fourth Proportional to 1,359.88, 1,875.43 and 918.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.88 : 1,875.43 = 918.38 : x
2. Step 2: Convert to fraction form
   1,359.88/1,875.43 = 918.38/x
3. Step 3: Cross multiply
   1,359.88x = 1,875.43 × 918.38
4. Step 4: Simplify right side
   1,359.88x = 1,722,347.52
5. Step 5: Solve for x
   x = 1,722,347.52/1,359.88
6. Step 6: Final answer
   x = 1,266.55