Finding the Fourth Proportional to 8,892.78, 12,272.31 and 4,914.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,892.78 : 12,272.31 = 4,914.15 : x
2. Step 2: Convert to fraction form
   8,892.78/12,272.31 = 4,914.15/x
3. Step 3: Cross multiply
   8,892.78x = 12,272.31 × 4,914.15
4. Step 4: Simplify right side
   8,892.78x = 60,307,972.19
5. Step 5: Solve for x
   x = 60,307,972.19/8,892.78
6. Step 6: Final answer
   x = 6,781.68