Finding the Fourth Proportional to 8,577.78, 12,864.01 and 3,312.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,577.78 : 12,864.01 = 3,312.37 : x
2. Step 2: Convert to fraction form
   8,577.78/12,864.01 = 3,312.37/x
3. Step 3: Cross multiply
   8,577.78x = 12,864.01 × 3,312.37
4. Step 4: Simplify right side
   8,577.78x = 42,610,360.80
5. Step 5: Solve for x
   x = 42,610,360.80/8,577.78
6. Step 6: Final answer
   x = 4,967.53