Finding the Fourth Proportional to 42,406.24, 63,618.56 and 12,823.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,406.24 : 63,618.56 = 12,823.32 : x
2. Step 2: Convert to fraction form
   42,406.24/63,618.56 = 12,823.32/x
3. Step 3: Cross multiply
   42,406.24x = 63,618.56 × 12,823.32
4. Step 4: Simplify right side
   42,406.24x = 815,801,152.82
5. Step 5: Solve for x
   x = 815,801,152.82/42,406.24
6. Step 6: Final answer
   x = 19,237.76