Finding the Fourth Proportional to 7,116.88, 9,820.38 and 3,973.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.88 : 9,820.38 = 3,973.20 : x
2. Step 2: Convert to fraction form
   7,116.88/9,820.38 = 3,973.20/x
3. Step 3: Cross multiply
   7,116.88x = 9,820.38 × 3,973.20
4. Step 4: Simplify right side
   7,116.88x = 39,018,333.82
5. Step 5: Solve for x
   x = 39,018,333.82/7,116.88
6. Step 6: Final answer
   x = 5,482.51