Finding the Fourth Proportional to 2,643.15, 3,970.89 and 2,274.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.15 : 3,970.89 = 2,274.10 : x
2. Step 2: Convert to fraction form
   2,643.15/3,970.89 = 2,274.10/x
3. Step 3: Cross multiply
   2,643.15x = 3,970.89 × 2,274.10
4. Step 4: Simplify right side
   2,643.15x = 9,030,200.95
5. Step 5: Solve for x
   x = 9,030,200.95/2,643.15
6. Step 6: Final answer
   x = 3,416.45