Finding the Fourth Proportional to 7,116.48, 9,820.96 and 3,972.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.48 : 9,820.96 = 3,972.80 : x
2. Step 2: Convert to fraction form
   7,116.48/9,820.96 = 3,972.80/x
3. Step 3: Cross multiply
   7,116.48x = 9,820.96 × 3,972.80
4. Step 4: Simplify right side
   7,116.48x = 39,016,709.89
5. Step 5: Solve for x
   x = 39,016,709.89/7,116.48
6. Step 6: Final answer
   x = 5,482.59