Finding the Fourth Proportional to 9,980.57, 14,970.83 and 3,406.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.57 : 14,970.83 = 3,406.20 : x
2. Step 2: Convert to fraction form
   9,980.57/14,970.83 = 3,406.20/x
3. Step 3: Cross multiply
   9,980.57x = 14,970.83 × 3,406.20
4. Step 4: Simplify right side
   9,980.57x = 50,993,624.12
5. Step 5: Solve for x
   x = 50,993,624.12/9,980.57
6. Step 6: Final answer
   x = 5,109.29