Finding the Fourth Proportional to 47,756.34, 71,609.78 and 21,438.42

Step by Step Solution

1. Step 1: Write the proportion equation
   47,756.34 : 71,609.78 = 21,438.42 : x
2. Step 2: Convert to fraction form
   47,756.34/71,609.78 = 21,438.42/x
3. Step 3: Cross multiply
   47,756.34x = 71,609.78 × 21,438.42
4. Step 4: Simplify right side
   47,756.34x = 1,535,200,539.75
5. Step 5: Solve for x
   x = 1,535,200,539.75/47,756.34
6. Step 6: Final answer
   x = 32,146.53