Finding the Fourth Proportional to 3,129.98, 4,310.62 and 3,061.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,129.98 : 4,310.62 = 3,061.94 : x
2. Step 2: Convert to fraction form
   3,129.98/4,310.62 = 3,061.94/x
3. Step 3: Cross multiply
   3,129.98x = 4,310.62 × 3,061.94
4. Step 4: Simplify right side
   3,129.98x = 13,198,830.59
5. Step 5: Solve for x
   x = 13,198,830.59/3,129.98
6. Step 6: Final answer
   x = 4,216.91