Finding the Fourth Proportional to 42,521.30, 63,783 and 20,337.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,521.30 : 63,783 = 20,337.02 : x
2. Step 2: Convert to fraction form
   42,521.30/63,783 = 20,337.02/x
3. Step 3: Cross multiply
   42,521.30x = 63,783 × 20,337.02
4. Step 4: Simplify right side
   42,521.30x = 1,297,156,146.66
5. Step 5: Solve for x
   x = 1,297,156,146.66/42,521.30
6. Step 6: Final answer
   x = 30,506.03