Finding the Fourth Proportional to 5,262.63, 7,886.43 and 3,865.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,262.63 : 7,886.43 = 3,865.01 : x
2. Step 2: Convert to fraction form
   5,262.63/7,886.43 = 3,865.01/x
3. Step 3: Cross multiply
   5,262.63x = 7,886.43 × 3,865.01
4. Step 4: Simplify right side
   5,262.63x = 30,481,091.38
5. Step 5: Solve for x
   x = 30,481,091.38/5,262.63
6. Step 6: Final answer
   x = 5,791.99