Finding the Fourth Proportional to 2,086.10, 3,127.60 and 1,264.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.10 : 3,127.60 = 1,264.17 : x
2. Step 2: Convert to fraction form
   2,086.10/3,127.60 = 1,264.17/x
3. Step 3: Cross multiply
   2,086.10x = 3,127.60 × 1,264.17
4. Step 4: Simplify right side
   2,086.10x = 3,953,824.29
5. Step 5: Solve for x
   x = 3,953,824.29/2,086.10
6. Step 6: Final answer
   x = 1,895.31