Finding the Fourth Proportional to 42,522.72, 63,742.70 and 20,330.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,522.72 : 63,742.70 = 20,330.34 : x
2. Step 2: Convert to fraction form
   42,522.72/63,742.70 = 20,330.34/x
3. Step 3: Cross multiply
   42,522.72x = 63,742.70 × 20,330.34
4. Step 4: Simplify right side
   42,522.72x = 1,295,910,763.52
5. Step 5: Solve for x
   x = 1,295,910,763.52/42,522.72
6. Step 6: Final answer
   x = 30,475.73