Finding the Fourth Proportional to 2,648.76, 3,970.04 and 1,770.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.76 : 3,970.04 = 1,770.20 : x
2. Step 2: Convert to fraction form
   2,648.76/3,970.04 = 1,770.20/x
3. Step 3: Cross multiply
   2,648.76x = 3,970.04 × 1,770.20
4. Step 4: Simplify right side
   2,648.76x = 7,027,764.81
5. Step 5: Solve for x
   x = 7,027,764.81/2,648.76
6. Step 6: Final answer
   x = 2,653.23