Finding the Fourth Proportional to 42,103.95, 63,155.37 and 12,118.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,103.95 : 63,155.37 = 12,118.92 : x
2. Step 2: Convert to fraction form
   42,103.95/63,155.37 = 12,118.92/x
3. Step 3: Cross multiply
   42,103.95x = 63,155.37 × 12,118.92
4. Step 4: Simplify right side
   42,103.95x = 765,374,876.60
5. Step 5: Solve for x
   x = 765,374,876.60/42,103.95
6. Step 6: Final answer
   x = 18,178.22