Finding the Fourth Proportional to 42,412.32, 63,603.54 and 12,418.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,412.32 : 63,603.54 = 12,418.29 : x
2. Step 2: Convert to fraction form
   42,412.32/63,603.54 = 12,418.29/x
3. Step 3: Cross multiply
   42,412.32x = 63,603.54 × 12,418.29
4. Step 4: Simplify right side
   42,412.32x = 789,847,204.75
5. Step 5: Solve for x
   x = 789,847,204.75/42,412.32
6. Step 6: Final answer
   x = 18,623.06