Finding the Fourth Proportional to 2,212.60, 3,057.78 and 1,769.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.60 : 3,057.78 = 1,769.80 : x
2. Step 2: Convert to fraction form
   2,212.60/3,057.78 = 1,769.80/x
3. Step 3: Cross multiply
   2,212.60x = 3,057.78 × 1,769.80
4. Step 4: Simplify right side
   2,212.60x = 5,411,659.04
5. Step 5: Solve for x
   x = 5,411,659.04/2,212.60
6. Step 6: Final answer
   x = 2,445.84