Finding the Fourth Proportional to 1,411.47, 1,946.34 and 991.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.47 : 1,946.34 = 991.68 : x
2. Step 2: Convert to fraction form
   1,411.47/1,946.34 = 991.68/x
3. Step 3: Cross multiply
   1,411.47x = 1,946.34 × 991.68
4. Step 4: Simplify right side
   1,411.47x = 1,930,146.45
5. Step 5: Solve for x
   x = 1,930,146.45/1,411.47
6. Step 6: Final answer
   x = 1,367.47