Finding the Fourth Proportional to 7,499.01, 10,273.59 and 7,218.65

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.01 : 10,273.59 = 7,218.65 : x
2. Step 2: Convert to fraction form
   7,499.01/10,273.59 = 7,218.65/x
3. Step 3: Cross multiply
   7,499.01x = 10,273.59 × 7,218.65
4. Step 4: Simplify right side
   7,499.01x = 74,161,450.45
5. Step 5: Solve for x
   x = 74,161,450.45/7,499.01
6. Step 6: Final answer
   x = 9,889.50