Finding the Fourth Proportional to 1,369.32, 1,890.57 and 1,054.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.32 : 1,890.57 = 1,054.02 : x
2. Step 2: Convert to fraction form
   1,369.32/1,890.57 = 1,054.02/x
3. Step 3: Cross multiply
   1,369.32x = 1,890.57 × 1,054.02
4. Step 4: Simplify right side
   1,369.32x = 1,992,698.59
5. Step 5: Solve for x
   x = 1,992,698.59/1,369.32
6. Step 6: Final answer
   x = 1,455.25