Finding the Fourth Proportional to 9,980.36, 14,968.61 and 3,315.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.36 : 14,968.61 = 3,315.83 : x
2. Step 2: Convert to fraction form
   9,980.36/14,968.61 = 3,315.83/x
3. Step 3: Cross multiply
   9,980.36x = 14,968.61 × 3,315.83
4. Step 4: Simplify right side
   9,980.36x = 49,633,274.67
5. Step 5: Solve for x
   x = 49,633,274.67/9,980.36
6. Step 6: Final answer
   x = 4,973.10