Finding the Fourth Proportional to 2,891.84, 3,989.83 and 1,772.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.84 : 3,989.83 = 1,772.22 : x
2. Step 2: Convert to fraction form
   2,891.84/3,989.83 = 1,772.22/x
3. Step 3: Cross multiply
   2,891.84x = 3,989.83 × 1,772.22
4. Step 4: Simplify right side
   2,891.84x = 7,070,856.52
5. Step 5: Solve for x
   x = 7,070,856.52/2,891.84
6. Step 6: Final answer
   x = 2,445.11