Finding the Fourth Proportional to 7,978.34, 11,011.43 and 6,086.35

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.34 : 11,011.43 = 6,086.35 : x
2. Step 2: Convert to fraction form
   7,978.34/11,011.43 = 6,086.35/x
3. Step 3: Cross multiply
   7,978.34x = 11,011.43 × 6,086.35
4. Step 4: Simplify right side
   7,978.34x = 67,019,431.22
5. Step 5: Solve for x
   x = 67,019,431.22/7,978.34
6. Step 6: Final answer
   x = 8,400.17