Finding the Fourth Proportional to 7,061.94, 9,745.80 and 3,918.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,061.94 : 9,745.80 = 3,918.12 : x
2. Step 2: Convert to fraction form
   7,061.94/9,745.80 = 3,918.12/x
3. Step 3: Cross multiply
   7,061.94x = 9,745.80 × 3,918.12
4. Step 4: Simplify right side
   7,061.94x = 38,185,213.90
5. Step 5: Solve for x
   x = 38,185,213.90/7,061.94
6. Step 6: Final answer
   x = 5,407.18