Finding the Fourth Proportional to 10,816.96, 14,918.88 and 7,090.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.96 : 14,918.88 = 7,090.24 : x
2. Step 2: Convert to fraction form
   10,816.96/14,918.88 = 7,090.24/x
3. Step 3: Cross multiply
   10,816.96x = 14,918.88 × 7,090.24
4. Step 4: Simplify right side
   10,816.96x = 105,778,439.73
5. Step 5: Solve for x
   x = 105,778,439.73/10,816.96
6. Step 6: Final answer
   x = 9,778.94