Finding the Fourth Proportional to 42,105.96, 63,158.36 and 12,120.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,105.96 : 63,158.36 = 12,120.92 : x
2. Step 2: Convert to fraction form
   42,105.96/63,158.36 = 12,120.92/x
3. Step 3: Cross multiply
   42,105.96x = 63,158.36 × 12,120.92
4. Step 4: Simplify right side
   42,105.96x = 765,537,428.89
5. Step 5: Solve for x
   x = 765,537,428.89/42,105.96
6. Step 6: Final answer
   x = 18,181.21