Finding the Fourth Proportional to 1,247.35, 1,870.81 and 369.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247.35 : 1,870.81 = 369.83 : x
2. Step 2: Convert to fraction form
   1,247.35/1,870.81 = 369.83/x
3. Step 3: Cross multiply
   1,247.35x = 1,870.81 × 369.83
4. Step 4: Simplify right side
   1,247.35x = 691,870.46
5. Step 5: Solve for x
   x = 691,870.46/1,247.35
6. Step 6: Final answer
   x = 554.67