Finding the Fourth Proportional to 4,754.30, 7,139.55 and 3,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,754.30 : 7,139.55 = 3,118.10 : x
2. Step 2: Convert to fraction form
   4,754.30/7,139.55 = 3,118.10/x
3. Step 3: Cross multiply
   4,754.30x = 7,139.55 × 3,118.10
4. Step 4: Simplify right side
   4,754.30x = 22,261,830.86
5. Step 5: Solve for x
   x = 22,261,830.86/4,754.30
6. Step 6: Final answer
   x = 4,682.46