Finding the Fourth Proportional to 9,980.30, 14,971.82 and 3,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.30 : 14,971.82 = 3,404.72 : x
2. Step 2: Convert to fraction form
   9,980.30/14,971.82 = 3,404.72/x
3. Step 3: Cross multiply
   9,980.30x = 14,971.82 × 3,404.72
4. Step 4: Simplify right side
   9,980.30x = 50,974,819.25
5. Step 5: Solve for x
   x = 50,974,819.25/9,980.30
6. Step 6: Final answer
   x = 5,107.54