Finding the Fourth Proportional to 5,118.94, 7,061.43 and 3,129.58

Step by Step Solution

1. Step 1: Write the proportion equation
   5,118.94 : 7,061.43 = 3,129.58 : x
2. Step 2: Convert to fraction form
   5,118.94/7,061.43 = 3,129.58/x
3. Step 3: Cross multiply
   5,118.94x = 7,061.43 × 3,129.58
4. Step 4: Simplify right side
   5,118.94x = 22,099,310.10
5. Step 5: Solve for x
   x = 22,099,310.10/5,118.94
6. Step 6: Final answer
   x = 4,317.17