Finding the Fourth Proportional to 9,980.73, 14,972.43 and 3,405.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.73 : 14,972.43 = 3,405.15 : x
2. Step 2: Convert to fraction form
   9,980.73/14,972.43 = 3,405.15/x
3. Step 3: Cross multiply
   9,980.73x = 14,972.43 × 3,405.15
4. Step 4: Simplify right side
   9,980.73x = 50,983,370.01
5. Step 5: Solve for x
   x = 50,983,370.01/9,980.73
6. Step 6: Final answer
   x = 5,108.18