Finding the Fourth Proportional to 7,176.02, 9,902.83 and 3,945.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,176.02 : 9,902.83 = 3,945.89 : x
2. Step 2: Convert to fraction form
   7,176.02/9,902.83 = 3,945.89/x
3. Step 3: Cross multiply
   7,176.02x = 9,902.83 × 3,945.89
4. Step 4: Simplify right side
   7,176.02x = 39,075,477.87
5. Step 5: Solve for x
   x = 39,075,477.87/7,176.02
6. Step 6: Final answer
   x = 5,445.29