Finding the Fourth Proportional to 7,080.72, 10,621.42 and 5,009.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,080.72 : 10,621.42 = 5,009.98 : x
2. Step 2: Convert to fraction form
   7,080.72/10,621.42 = 5,009.98/x
3. Step 3: Cross multiply
   7,080.72x = 10,621.42 × 5,009.98
4. Step 4: Simplify right side
   7,080.72x = 53,213,045.69
5. Step 5: Solve for x
   x = 53,213,045.69/7,080.72
6. Step 6: Final answer
   x = 7,515.21