Finding the Fourth Proportional to 12,699.48, 17,630.85 and 12,319.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.48 : 17,630.85 = 12,319.32 : x
2. Step 2: Convert to fraction form
   12,699.48/17,630.85 = 12,319.32/x
3. Step 3: Cross multiply
   12,699.48x = 17,630.85 × 12,319.32
4. Step 4: Simplify right side
   12,699.48x = 217,200,083.02
5. Step 5: Solve for x
   x = 217,200,083.02/12,699.48
6. Step 6: Final answer
   x = 17,103.07