Finding the Fourth Proportional to 42,579.83, 63,840.30 and 18,874.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,579.83 : 63,840.30 = 18,874.42 : x
2. Step 2: Convert to fraction form
   42,579.83/63,840.30 = 18,874.42/x
3. Step 3: Cross multiply
   42,579.83x = 63,840.30 × 18,874.42
4. Step 4: Simplify right side
   42,579.83x = 1,204,948,510.91
5. Step 5: Solve for x
   x = 1,204,948,510.91/42,579.83
6. Step 6: Final answer
   x = 28,298.58