Finding the Fourth Proportional to 1,433.45, 2,146.14 and 912.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.45 : 2,146.14 = 912.17 : x
2. Step 2: Convert to fraction form
   1,433.45/2,146.14 = 912.17/x
3. Step 3: Cross multiply
   1,433.45x = 2,146.14 × 912.17
4. Step 4: Simplify right side
   1,433.45x = 1,957,649.89
5. Step 5: Solve for x
   x = 1,957,649.89/1,433.45
6. Step 6: Final answer
   x = 1,365.69