Finding the Fourth Proportional to 1,411.89, 1,947.63 and 992.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.89 : 1,947.63 = 992.07 : x
2. Step 2: Convert to fraction form
   1,411.89/1,947.63 = 992.07/x
3. Step 3: Cross multiply
   1,411.89x = 1,947.63 × 992.07
4. Step 4: Simplify right side
   1,411.89x = 1,932,185.29
5. Step 5: Solve for x
   x = 1,932,185.29/1,411.89
6. Step 6: Final answer
   x = 1,368.51