Finding the Fourth Proportional to 2,087.65, 2,881.56 and 1,380.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.65 : 2,881.56 = 1,380.01 : x
2. Step 2: Convert to fraction form
   2,087.65/2,881.56 = 1,380.01/x
3. Step 3: Cross multiply
   2,087.65x = 2,881.56 × 1,380.01
4. Step 4: Simplify right side
   2,087.65x = 3,976,581.62
5. Step 5: Solve for x
   x = 3,976,581.62/2,087.65
6. Step 6: Final answer
   x = 1,904.81