Finding the Fourth Proportional to 6,131.91, 8,460.57 and 3,480.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,131.91 : 8,460.57 = 3,480.78 : x
2. Step 2: Convert to fraction form
   6,131.91/8,460.57 = 3,480.78/x
3. Step 3: Cross multiply
   6,131.91x = 8,460.57 × 3,480.78
4. Step 4: Simplify right side
   6,131.91x = 29,449,382.84
5. Step 5: Solve for x
   x = 29,449,382.84/6,131.91
6. Step 6: Final answer
   x = 4,802.64