Finding the Fourth Proportional to 2,086.61, 2,880.29 and 1,300.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.61 : 2,880.29 = 1,300.64 : x
2. Step 2: Convert to fraction form
   2,086.61/2,880.29 = 1,300.64/x
3. Step 3: Cross multiply
   2,086.61x = 2,880.29 × 1,300.64
4. Step 4: Simplify right side
   2,086.61x = 3,746,209.24
5. Step 5: Solve for x
   x = 3,746,209.24/2,086.61
6. Step 6: Final answer
   x = 1,795.36