Finding the Fourth Proportional to 2,069.90, 2,856.53 and 1,185.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.90 : 2,856.53 = 1,185.87 : x
2. Step 2: Convert to fraction form
   2,069.90/2,856.53 = 1,185.87/x
3. Step 3: Cross multiply
   2,069.90x = 2,856.53 × 1,185.87
4. Step 4: Simplify right side
   2,069.90x = 3,387,480.88
5. Step 5: Solve for x
   x = 3,387,480.88/2,069.90
6. Step 6: Final answer
   x = 1,636.54