Finding the Fourth Proportional to 2,643.77, 3,964.35 and 888.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.77 : 3,964.35 = 888.17 : x
2. Step 2: Convert to fraction form
   2,643.77/3,964.35 = 888.17/x
3. Step 3: Cross multiply
   2,643.77x = 3,964.35 × 888.17
4. Step 4: Simplify right side
   2,643.77x = 3,521,016.74
5. Step 5: Solve for x
   x = 3,521,016.74/2,643.77
6. Step 6: Final answer
   x = 1,331.82