Finding the Fourth Proportional to 10,811.15, 14,918.27 and 7,980.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,811.15 : 14,918.27 = 7,980.02 : x
2. Step 2: Convert to fraction form
   10,811.15/14,918.27 = 7,980.02/x
3. Step 3: Cross multiply
   10,811.15x = 14,918.27 × 7,980.02
4. Step 4: Simplify right side
   10,811.15x = 119,047,978.47
5. Step 5: Solve for x
   x = 119,047,978.47/10,811.15
6. Step 6: Final answer
   x = 11,011.60