Finding the Fourth Proportional to 1,434.24, 2,150.91 and 913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.24 : 2,150.91 = 913.50 : x
2. Step 2: Convert to fraction form
   1,434.24/2,150.91 = 913.50/x
3. Step 3: Cross multiply
   1,434.24x = 2,150.91 × 913.50
4. Step 4: Simplify right side
   1,434.24x = 1,964,856.29
5. Step 5: Solve for x
   x = 1,964,856.29/1,434.24
6. Step 6: Final answer
   x = 1,369.96