Finding the Fourth Proportional to 1,386.14, 1,910.24 and 992.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.14 : 1,910.24 = 992.48 : x
2. Step 2: Convert to fraction form
   1,386.14/1,910.24 = 992.48/x
3. Step 3: Cross multiply
   1,386.14x = 1,910.24 × 992.48
4. Step 4: Simplify right side
   1,386.14x = 1,895,870.03
5. Step 5: Solve for x
   x = 1,895,870.03/1,386.14
6. Step 6: Final answer
   x = 1,367.73