Finding the Fourth Proportional to 2,648.10, 3,972.38 and 700.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.10 : 3,972.38 = 700.30 : x
2. Step 2: Convert to fraction form
   2,648.10/3,972.38 = 700.30/x
3. Step 3: Cross multiply
   2,648.10x = 3,972.38 × 700.30
4. Step 4: Simplify right side
   2,648.10x = 2,781,857.71
5. Step 5: Solve for x
   x = 2,781,857.71/2,648.10
6. Step 6: Final answer
   x = 1,050.51