Finding the Fourth Proportional to 6,619.76, 9,929.46 and 3,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,619.76 : 9,929.46 = 3,061.40 : x
2. Step 2: Convert to fraction form
   6,619.76/9,929.46 = 3,061.40/x
3. Step 3: Cross multiply
   6,619.76x = 9,929.46 × 3,061.40
4. Step 4: Simplify right side
   6,619.76x = 30,398,048.84
5. Step 5: Solve for x
   x = 30,398,048.84/6,619.76
6. Step 6: Final answer
   x = 4,592.02