Finding the Fourth Proportional to 7,116.22, 9,820.20 and 3,972.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.22 : 9,820.20 = 3,972.34 : x
2. Step 2: Convert to fraction form
   7,116.22/9,820.20 = 3,972.34/x
3. Step 3: Cross multiply
   7,116.22x = 9,820.20 × 3,972.34
4. Step 4: Simplify right side
   7,116.22x = 39,009,173.27
5. Step 5: Solve for x
   x = 39,009,173.27/7,116.22
6. Step 6: Final answer
   x = 5,481.73