Finding the Fourth Proportional to 12,384.72, 18,579.90 and 4,065.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,384.72 : 18,579.90 = 4,065.30 : x
2. Step 2: Convert to fraction form
   12,384.72/18,579.90 = 4,065.30/x
3. Step 3: Cross multiply
   12,384.72x = 18,579.90 × 4,065.30
4. Step 4: Simplify right side
   12,384.72x = 75,532,867.47
5. Step 5: Solve for x
   x = 75,532,867.47/12,384.72
6. Step 6: Final answer
   x = 6,098.88