Finding the Fourth Proportional to 12,964.59, 17,892.50 and 7,659.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,964.59 : 17,892.50 = 7,659.90 : x
2. Step 2: Convert to fraction form
   12,964.59/17,892.50 = 7,659.90/x
3. Step 3: Cross multiply
   12,964.59x = 17,892.50 × 7,659.90
4. Step 4: Simplify right side
   12,964.59x = 137,054,722.45
5. Step 5: Solve for x
   x = 137,054,722.45/12,964.59
6. Step 6: Final answer
   x = 10,571.47