Finding the Fourth Proportional to 7,072.90, 9,760.77 and 3,886.17

Step by Step Solution

1. Step 1: Write the proportion equation
   7,072.90 : 9,760.77 = 3,886.17 : x
2. Step 2: Convert to fraction form
   7,072.90/9,760.77 = 3,886.17/x
3. Step 3: Cross multiply
   7,072.90x = 9,760.77 × 3,886.17
4. Step 4: Simplify right side
   7,072.90x = 37,931,970.09
5. Step 5: Solve for x
   x = 37,931,970.09/7,072.90
6. Step 6: Final answer
   x = 5,363.00