Finding the Fourth Proportional to 6,131.78, 8,460.38 and 3,613.70

Step by Step Solution

1. Step 1: Write the proportion equation
   6,131.78 : 8,460.38 = 3,613.70 : x
2. Step 2: Convert to fraction form
   6,131.78/8,460.38 = 3,613.70/x
3. Step 3: Cross multiply
   6,131.78x = 8,460.38 × 3,613.70
4. Step 4: Simplify right side
   6,131.78x = 30,573,275.21
5. Step 5: Solve for x
   x = 30,573,275.21/6,131.78
6. Step 6: Final answer
   x = 4,986.04