Finding the Fourth Proportional to 2,087.34, 2,880.83 and 1,191.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.34 : 2,880.83 = 1,191.07 : x
2. Step 2: Convert to fraction form
   2,087.34/2,880.83 = 1,191.07/x
3. Step 3: Cross multiply
   2,087.34x = 2,880.83 × 1,191.07
4. Step 4: Simplify right side
   2,087.34x = 3,431,276.77
5. Step 5: Solve for x
   x = 3,431,276.77/2,087.34
6. Step 6: Final answer
   x = 1,643.85