Finding the Fourth Proportional to 2,648.62, 3,967.64 and 1,263.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.62 : 3,967.64 = 1,263.30 : x
2. Step 2: Convert to fraction form
   2,648.62/3,967.64 = 1,263.30/x
3. Step 3: Cross multiply
   2,648.62x = 3,967.64 × 1,263.30
4. Step 4: Simplify right side
   2,648.62x = 5,012,319.61
5. Step 5: Solve for x
   x = 5,012,319.61/2,648.62
6. Step 6: Final answer
   x = 1,892.43