Finding the Fourth Proportional to 1,398.89, 1,930.16 and 901.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.89 : 1,930.16 = 901.46 : x
2. Step 2: Convert to fraction form
   1,398.89/1,930.16 = 901.46/x
3. Step 3: Cross multiply
   1,398.89x = 1,930.16 × 901.46
4. Step 4: Simplify right side
   1,398.89x = 1,739,952.38
5. Step 5: Solve for x
   x = 1,739,952.38/1,398.89
6. Step 6: Final answer
   x = 1,243.81