Finding the Fourth Proportional to 7,061.90, 9,745.32 and 3,918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,061.90 : 9,745.32 = 3,918.10 : x
2. Step 2: Convert to fraction form
   7,061.90/9,745.32 = 3,918.10/x
3. Step 3: Cross multiply
   7,061.90x = 9,745.32 × 3,918.10
4. Step 4: Simplify right side
   7,061.90x = 38,183,079.77
5. Step 5: Solve for x
   x = 38,183,079.77/7,061.90
6. Step 6: Final answer
   x = 5,406.92