Finding the Fourth Proportional to 7,020.79, 9,688.69 and 3,876.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,020.79 : 9,688.69 = 3,876.98 : x
2. Step 2: Convert to fraction form
   7,020.79/9,688.69 = 3,876.98/x
3. Step 3: Cross multiply
   7,020.79x = 9,688.69 × 3,876.98
4. Step 4: Simplify right side
   7,020.79x = 37,562,799.22
5. Step 5: Solve for x
   x = 37,562,799.22/7,020.79
6. Step 6: Final answer
   x = 5,350.23