Finding the Fourth Proportional to 7,116.42, 9,820.55 and 3,930.04

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.42 : 9,820.55 = 3,930.04 : x
2. Step 2: Convert to fraction form
   7,116.42/9,820.55 = 3,930.04/x
3. Step 3: Cross multiply
   7,116.42x = 9,820.55 × 3,930.04
4. Step 4: Simplify right side
   7,116.42x = 38,595,085.57
5. Step 5: Solve for x
   x = 38,595,085.57/7,116.42
6. Step 6: Final answer
   x = 5,423.39