Finding the Fourth Proportional to 3,870.38, 5,805.12 and 1,097.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.38 : 5,805.12 = 1,097.30 : x
2. Step 2: Convert to fraction form
   3,870.38/5,805.12 = 1,097.30/x
3. Step 3: Cross multiply
   3,870.38x = 5,805.12 × 1,097.30
4. Step 4: Simplify right side
   3,870.38x = 6,369,958.18
5. Step 5: Solve for x
   x = 6,369,958.18/3,870.38
6. Step 6: Final answer
   x = 1,645.82