Finding the Fourth Proportional to 42,388.27, 63,579.47 and 12,806.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,388.27 : 63,579.47 = 12,806.26 : x
2. Step 2: Convert to fraction form
   42,388.27/63,579.47 = 12,806.26/x
3. Step 3: Cross multiply
   42,388.27x = 63,579.47 × 12,806.26
4. Step 4: Simplify right side
   42,388.27x = 814,215,414.45
5. Step 5: Solve for x
   x = 814,215,414.45/42,388.27
6. Step 6: Final answer
   x = 19,208.51