Finding the Fourth Proportional to 12,964.72, 17,898.12 and 9,190.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,964.72 : 17,898.12 = 9,190.96 : x
2. Step 2: Convert to fraction form
   12,964.72/17,898.12 = 9,190.96/x
3. Step 3: Cross multiply
   12,964.72x = 17,898.12 × 9,190.96
4. Step 4: Simplify right side
   12,964.72x = 164,500,905.00
5. Step 5: Solve for x
   x = 164,500,905.00/12,964.72
6. Step 6: Final answer
   x = 12,688.35