Finding the Fourth Proportional to 42,248.10, 63,379.80 and 20,061.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,248.10 : 63,379.80 = 20,061.30 : x
2. Step 2: Convert to fraction form
   42,248.10/63,379.80 = 20,061.30/x
3. Step 3: Cross multiply
   42,248.10x = 63,379.80 × 20,061.30
4. Step 4: Simplify right side
   42,248.10x = 1,271,481,181.74
5. Step 5: Solve for x
   x = 1,271,481,181.74/42,248.10
6. Step 6: Final answer
   x = 30,095.58