Finding the Fourth Proportional to 1,411.28, 1,946.59 and 992.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.28 : 1,946.59 = 992.51 : x
2. Step 2: Convert to fraction form
   1,411.28/1,946.59 = 992.51/x
3. Step 3: Cross multiply
   1,411.28x = 1,946.59 × 992.51
4. Step 4: Simplify right side
   1,411.28x = 1,931,997.83
5. Step 5: Solve for x
   x = 1,931,997.83/1,411.28
6. Step 6: Final answer
   x = 1,368.97