Finding the Fourth Proportional to 42,388.10, 63,582.64 and 12,806.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,388.10 : 63,582.64 = 12,806.18 : x
2. Step 2: Convert to fraction form
   42,388.10/63,582.64 = 12,806.18/x
3. Step 3: Cross multiply
   42,388.10x = 63,582.64 × 12,806.18
4. Step 4: Simplify right side
   42,388.10x = 814,250,732.72
5. Step 5: Solve for x
   x = 814,250,732.72/42,388.10
6. Step 6: Final answer
   x = 19,209.42