Finding the Fourth Proportional to 12,997.86, 17,929.35 and 7,964.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.86 : 17,929.35 = 7,964.34 : x
2. Step 2: Convert to fraction form
   12,997.86/17,929.35 = 7,964.34/x
3. Step 3: Cross multiply
   12,997.86x = 17,929.35 × 7,964.34
4. Step 4: Simplify right side
   12,997.86x = 142,795,439.38
5. Step 5: Solve for x
   x = 142,795,439.38/12,997.86
6. Step 6: Final answer
   x = 10,986.07