Finding the Fourth Proportional to 8,077.94, 12,120.45 and 3,921.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,077.94 : 12,120.45 = 3,921.14 : x
2. Step 2: Convert to fraction form
   8,077.94/12,120.45 = 3,921.14/x
3. Step 3: Cross multiply
   8,077.94x = 12,120.45 × 3,921.14
4. Step 4: Simplify right side
   8,077.94x = 47,525,981.31
5. Step 5: Solve for x
   x = 47,525,981.31/8,077.94
6. Step 6: Final answer
   x = 5,883.43