Finding the Fourth Proportional to 8,056.40, 12,077.71 and 3,129.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,056.40 : 12,077.71 = 3,129.57 : x
2. Step 2: Convert to fraction form
   8,056.40/12,077.71 = 3,129.57/x
3. Step 3: Cross multiply
   8,056.40x = 12,077.71 × 3,129.57
4. Step 4: Simplify right side
   8,056.40x = 37,798,031.06
5. Step 5: Solve for x
   x = 37,798,031.06/8,056.40
6. Step 6: Final answer
   x = 4,691.68