Finding the Fourth Proportional to 8,081.60, 12,117.43 and 3,145.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.60 : 12,117.43 = 3,145.49 : x
2. Step 2: Convert to fraction form
   8,081.60/12,117.43 = 3,145.49/x
3. Step 3: Cross multiply
   8,081.60x = 12,117.43 × 3,145.49
4. Step 4: Simplify right side
   8,081.60x = 38,115,254.89
5. Step 5: Solve for x
   x = 38,115,254.89/8,081.60
6. Step 6: Final answer
   x = 4,716.30