Finding the Fourth Proportional to 7,086.98, 9,779.87 and 3,856.70

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.98 : 9,779.87 = 3,856.70 : x
2. Step 2: Convert to fraction form
   7,086.98/9,779.87 = 3,856.70/x
3. Step 3: Cross multiply
   7,086.98x = 9,779.87 × 3,856.70
4. Step 4: Simplify right side
   7,086.98x = 37,718,058.72
5. Step 5: Solve for x
   x = 37,718,058.72/7,086.98
6. Step 6: Final answer
   x = 5,322.16