Finding the Fourth Proportional to 42,451.07, 63,579.63 and 20,280.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,451.07 : 63,579.63 = 20,280.15 : x
2. Step 2: Convert to fraction form
   42,451.07/63,579.63 = 20,280.15/x
3. Step 3: Cross multiply
   42,451.07x = 63,579.63 × 20,280.15
4. Step 4: Simplify right side
   42,451.07x = 1,289,404,433.34
5. Step 5: Solve for x
   x = 1,289,404,433.34/42,451.07
6. Step 6: Final answer
   x = 30,373.90