Finding the Fourth Proportional to 8,047.78, 12,069.30 and 3,116.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,047.78 : 12,069.30 = 3,116.25 : x
2. Step 2: Convert to fraction form
   8,047.78/12,069.30 = 3,116.25/x
3. Step 3: Cross multiply
   8,047.78x = 12,069.30 × 3,116.25
4. Step 4: Simplify right side
   8,047.78x = 37,610,956.13
5. Step 5: Solve for x
   x = 37,610,956.13/8,047.78
6. Step 6: Final answer
   x = 4,673.46