Finding the Fourth Proportional to 1,399, 1,930.62 and 1,067.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399 : 1,930.62 = 1,067.80 : x
2. Step 2: Convert to fraction form
   1,399/1,930.62 = 1,067.80/x
3. Step 3: Cross multiply
   1,399x = 1,930.62 × 1,067.80
4. Step 4: Simplify right side
   1,399x = 2,061,516.04
5. Step 5: Solve for x
   x = 2,061,516.04/1,399
6. Step 6: Final answer
   x = 1,473.56