Finding the Fourth Proportional to 10,856.01, 14,979.69 and 6,140.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,856.01 : 14,979.69 = 6,140.19 : x
2. Step 2: Convert to fraction form
   10,856.01/14,979.69 = 6,140.19/x
3. Step 3: Cross multiply
   10,856.01x = 14,979.69 × 6,140.19
4. Step 4: Simplify right side
   10,856.01x = 91,978,142.74
5. Step 5: Solve for x
   x = 91,978,142.74/10,856.01
6. Step 6: Final answer
   x = 8,472.56