Finding the Fourth Proportional to 12,653.73, 18,967.89 and 4,328.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,653.73 : 18,967.89 = 4,328.06 : x
2. Step 2: Convert to fraction form
   12,653.73/18,967.89 = 4,328.06/x
3. Step 3: Cross multiply
   12,653.73x = 18,967.89 × 4,328.06
4. Step 4: Simplify right side
   12,653.73x = 82,094,158.51
5. Step 5: Solve for x
   x = 82,094,158.51/12,653.73
6. Step 6: Final answer
   x = 6,487.74