Finding the Fourth Proportional to 13,384.47, 18,473.16 and 7,722.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,384.47 : 18,473.16 = 7,722.88 : x
2. Step 2: Convert to fraction form
   13,384.47/18,473.16 = 7,722.88/x
3. Step 3: Cross multiply
   13,384.47x = 18,473.16 × 7,722.88
4. Step 4: Simplify right side
   13,384.47x = 142,665,997.90
5. Step 5: Solve for x
   x = 142,665,997.90/13,384.47
6. Step 6: Final answer
   x = 10,659.07