Finding the Fourth Proportional to 12,317.16, 16,991.88 and 8,958.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,317.16 : 16,991.88 = 8,958.52 : x
2. Step 2: Convert to fraction form
   12,317.16/16,991.88 = 8,958.52/x
3. Step 3: Cross multiply
   12,317.16x = 16,991.88 × 8,958.52
4. Step 4: Simplify right side
   12,317.16x = 152,222,096.82
5. Step 5: Solve for x
   x = 152,222,096.82/12,317.16
6. Step 6: Final answer
   x = 12,358.54