Finding the Fourth Proportional to 9,399.99, 12,971.37 and 5,151.00

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.99 : 12,971.37 = 5,151.00 : x
2. Step 2: Convert to fraction form
   9,399.99/12,971.37 = 5,151.00/x
3. Step 3: Cross multiply
   9,399.99x = 12,971.37 × 5,151.00
4. Step 4: Simplify right side
   9,399.99x = 66,815,462.01
5. Step 5: Solve for x
   x = 66,815,462.01/9,399.99
6. Step 6: Final answer
   x = 7,108.04