Finding the Fourth Proportional to 1,398.82, 1,929.86 and 901.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.82 : 1,929.86 = 901.74 : x
2. Step 2: Convert to fraction form
   1,398.82/1,929.86 = 901.74/x
3. Step 3: Cross multiply
   1,398.82x = 1,929.86 × 901.74
4. Step 4: Simplify right side
   1,398.82x = 1,740,231.96
5. Step 5: Solve for x
   x = 1,740,231.96/1,398.82
6. Step 6: Final answer
   x = 1,244.07