Finding the Fourth Proportional to 42,058.96, 63,078.72 and 12,469.66

Step by Step Solution

1. Step 1: Write the proportion equation
   42,058.96 : 63,078.72 = 12,469.66 : x
2. Step 2: Convert to fraction form
   42,058.96/63,078.72 = 12,469.66/x
3. Step 3: Cross multiply
   42,058.96x = 63,078.72 × 12,469.66
4. Step 4: Simplify right side
   42,058.96x = 786,570,377.07
5. Step 5: Solve for x
   x = 786,570,377.07/42,058.96
6. Step 6: Final answer
   x = 18,701.61