Finding the Fourth Proportional to 1,919.61, 2,870.40 and 1,370.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.61 : 2,870.40 = 1,370.09 : x
2. Step 2: Convert to fraction form
   1,919.61/2,870.40 = 1,370.09/x
3. Step 3: Cross multiply
   1,919.61x = 2,870.40 × 1,370.09
4. Step 4: Simplify right side
   1,919.61x = 3,932,706.34
5. Step 5: Solve for x
   x = 3,932,706.34/1,919.61
6. Step 6: Final answer
   x = 2,048.70