Finding the Fourth Proportional to 7,020.82, 9,688.35 and 3,876.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,020.82 : 9,688.35 = 3,876.78 : x
2. Step 2: Convert to fraction form
   7,020.82/9,688.35 = 3,876.78/x
3. Step 3: Cross multiply
   7,020.82x = 9,688.35 × 3,876.78
4. Step 4: Simplify right side
   7,020.82x = 37,559,601.51
5. Step 5: Solve for x
   x = 37,559,601.51/7,020.82
6. Step 6: Final answer
   x = 5,349.75