Finding the Fourth Proportional to 2,088.31, 2,880.85 and 1,380.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.31 : 2,880.85 = 1,380.43 : x
2. Step 2: Convert to fraction form
   2,088.31/2,880.85 = 1,380.43/x
3. Step 3: Cross multiply
   2,088.31x = 2,880.85 × 1,380.43
4. Step 4: Simplify right side
   2,088.31x = 3,976,811.77
5. Step 5: Solve for x
   x = 3,976,811.77/2,088.31
6. Step 6: Final answer
   x = 1,904.32