Finding the Fourth Proportional to 6,139.20, 9,219.69 and 5,030.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,139.20 : 9,219.69 = 5,030.72 : x
2. Step 2: Convert to fraction form
   6,139.20/9,219.69 = 5,030.72/x
3. Step 3: Cross multiply
   6,139.20x = 9,219.69 × 5,030.72
4. Step 4: Simplify right side
   6,139.20x = 46,381,632.78
5. Step 5: Solve for x
   x = 46,381,632.78/6,139.20
6. Step 6: Final answer
   x = 7,555.00