Finding the Fourth Proportional to 12,697.21, 17,513.98 and 7,973.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697.21 : 17,513.98 = 7,973.29 : x
2. Step 2: Convert to fraction form
   12,697.21/17,513.98 = 7,973.29/x
3. Step 3: Cross multiply
   12,697.21x = 17,513.98 × 7,973.29
4. Step 4: Simplify right side
   12,697.21x = 139,644,041.59
5. Step 5: Solve for x
   x = 139,644,041.59/12,697.21
6. Step 6: Final answer
   x = 10,998.01