Finding the Fourth Proportional to 10,979.76, 16,457.84 and 4,742.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,979.76 : 16,457.84 = 4,742.71 : x
2. Step 2: Convert to fraction form
   10,979.76/16,457.84 = 4,742.71/x
3. Step 3: Cross multiply
   10,979.76x = 16,457.84 × 4,742.71
4. Step 4: Simplify right side
   10,979.76x = 78,054,762.35
5. Step 5: Solve for x
   x = 78,054,762.35/10,979.76
6. Step 6: Final answer
   x = 7,108.97