Finding the Fourth Proportional to 42,118.20, 63,150.30 and 19,902.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118.20 : 63,150.30 = 19,902.60 : x
2. Step 2: Convert to fraction form
   42,118.20/63,150.30 = 19,902.60/x
3. Step 3: Cross multiply
   42,118.20x = 63,150.30 × 19,902.60
4. Step 4: Simplify right side
   42,118.20x = 1,256,855,160.78
5. Step 5: Solve for x
   x = 1,256,855,160.78/42,118.20
6. Step 6: Final answer
   x = 29,841.14