Finding the Fourth Proportional to 7,059.10, 9,742.72 and 3,916.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,059.10 : 9,742.72 = 3,916.30 : x
2. Step 2: Convert to fraction form
   7,059.10/9,742.72 = 3,916.30/x
3. Step 3: Cross multiply
   7,059.10x = 9,742.72 × 3,916.30
4. Step 4: Simplify right side
   7,059.10x = 38,155,355.83
5. Step 5: Solve for x
   x = 38,155,355.83/7,059.10
6. Step 6: Final answer
   x = 5,405.13