Finding the Fourth Proportional to 1,377.76, 1,900.04 and 936.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.76 : 1,900.04 = 936.32 : x
2. Step 2: Convert to fraction form
   1,377.76/1,900.04 = 936.32/x
3. Step 3: Cross multiply
   1,377.76x = 1,900.04 × 936.32
4. Step 4: Simplify right side
   1,377.76x = 1,779,045.45
5. Step 5: Solve for x
   x = 1,779,045.45/1,377.76
6. Step 6: Final answer
   x = 1,291.26