Finding the Fourth Proportional to 3,848.78, 5,312.69 and 2,276.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,848.78 : 5,312.69 = 2,276.88 : x
2. Step 2: Convert to fraction form
   3,848.78/5,312.69 = 2,276.88/x
3. Step 3: Cross multiply
   3,848.78x = 5,312.69 × 2,276.88
4. Step 4: Simplify right side
   3,848.78x = 12,096,357.61
5. Step 5: Solve for x
   x = 12,096,357.61/3,848.78
6. Step 6: Final answer
   x = 3,142.91