Finding the Fourth Proportional to 8,308.89, 12,455.82 and 4,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   8,308.89 : 12,455.82 = 4,978.17 : x
2. Step 2: Convert to fraction form
   8,308.89/12,455.82 = 4,978.17/x
3. Step 3: Cross multiply
   8,308.89x = 12,455.82 × 4,978.17
4. Step 4: Simplify right side
   8,308.89x = 62,007,189.45
5. Step 5: Solve for x
   x = 62,007,189.45/8,308.89
6. Step 6: Final answer
   x = 7,462.75