Finding the Fourth Proportional to 10,457.67, 14,428.07 and 5,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,457.67 : 14,428.07 = 5,978.25 : x
2. Step 2: Convert to fraction form
   10,457.67/14,428.07 = 5,978.25/x
3. Step 3: Cross multiply
   10,457.67x = 14,428.07 × 5,978.25
4. Step 4: Simplify right side
   10,457.67x = 86,254,609.48
5. Step 5: Solve for x
   x = 86,254,609.48/10,457.67
6. Step 6: Final answer
   x = 8,247.98