Finding the Fourth Proportional to 5,262.78, 7,877.72 and 3,877.68

Step by Step Solution

1. Step 1: Write the proportion equation
   5,262.78 : 7,877.72 = 3,877.68 : x
2. Step 2: Convert to fraction form
   5,262.78/7,877.72 = 3,877.68/x
3. Step 3: Cross multiply
   5,262.78x = 7,877.72 × 3,877.68
4. Step 4: Simplify right side
   5,262.78x = 30,547,277.29
5. Step 5: Solve for x
   x = 30,547,277.29/5,262.78
6. Step 6: Final answer
   x = 5,804.40