Finding the Fourth Proportional to 2,287.40, 3,428.79 and 901.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.40 : 3,428.79 = 901.71 : x
2. Step 2: Convert to fraction form
   2,287.40/3,428.79 = 901.71/x
3. Step 3: Cross multiply
   2,287.40x = 3,428.79 × 901.71
4. Step 4: Simplify right side
   2,287.40x = 3,091,774.23
5. Step 5: Solve for x
   x = 3,091,774.23/2,287.40
6. Step 6: Final answer
   x = 1,351.65