Finding the Fourth Proportional to 12,699.98, 17,631.55 and 12,319.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.98 : 17,631.55 = 12,319.82 : x
2. Step 2: Convert to fraction form
   12,699.98/17,631.55 = 12,319.82/x
3. Step 3: Cross multiply
   12,699.98x = 17,631.55 × 12,319.82
4. Step 4: Simplify right side
   12,699.98x = 217,217,460.72
5. Step 5: Solve for x
   x = 217,217,460.72/12,699.98
6. Step 6: Final answer
   x = 17,103.76