Finding the Fourth Proportional to 10,428.86, 14,388.17 and 7,241.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.86 : 14,388.17 = 7,241.31 : x
2. Step 2: Convert to fraction form
   10,428.86/14,388.17 = 7,241.31/x
3. Step 3: Cross multiply
   10,428.86x = 14,388.17 × 7,241.31
4. Step 4: Simplify right side
   10,428.86x = 104,189,163.10
5. Step 5: Solve for x
   x = 104,189,163.10/10,428.86
6. Step 6: Final answer
   x = 9,990.46