Finding the Fourth Proportional to 12,385.72, 18,581.40 and 4,066.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.72 : 18,581.40 = 4,066.30 : x
2. Step 2: Convert to fraction form
   12,385.72/18,581.40 = 4,066.30/x
3. Step 3: Cross multiply
   12,385.72x = 18,581.40 × 4,066.30
4. Step 4: Simplify right side
   12,385.72x = 75,557,546.82
5. Step 5: Solve for x
   x = 75,557,546.82/12,385.72
6. Step 6: Final answer
   x = 6,100.38