Finding the Fourth Proportional to 2,079.76, 2,870.76 and 1,381

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.76 : 2,870.76 = 1,381 : x
2. Step 2: Convert to fraction form
   2,079.76/2,870.76 = 1,381/x
3. Step 3: Cross multiply
   2,079.76x = 2,870.76 × 1,381
4. Step 4: Simplify right side
   2,079.76x = 3,964,519.56
5. Step 5: Solve for x
   x = 3,964,519.56/2,079.76
6. Step 6: Final answer
   x = 1,906.24