Finding the Fourth Proportional to 1,373.52, 1,870.08 and 1,369.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.52 : 1,870.08 = 1,369.20 : x
2. Step 2: Convert to fraction form
   1,373.52/1,870.08 = 1,369.20/x
3. Step 3: Cross multiply
   1,373.52x = 1,870.08 × 1,369.20
4. Step 4: Simplify right side
   1,373.52x = 2,560,513.54
5. Step 5: Solve for x
   x = 2,560,513.54/1,373.52
6. Step 6: Final answer
   x = 1,864.20