Finding the Fourth Proportional to 2,971.56, 4,100.78 and 1,645.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.56 : 4,100.78 = 1,645.22 : x
2. Step 2: Convert to fraction form
   2,971.56/4,100.78 = 1,645.22/x
3. Step 3: Cross multiply
   2,971.56x = 4,100.78 × 1,645.22
4. Step 4: Simplify right side
   2,971.56x = 6,746,685.27
5. Step 5: Solve for x
   x = 6,746,685.27/2,971.56
6. Step 6: Final answer
   x = 2,270.42