Finding the Fourth Proportional to 47,445.88, 71,160.18 and 21,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,445.88 : 71,160.18 = 21,145.72 : x
2. Step 2: Convert to fraction form
   47,445.88/71,160.18 = 21,145.72/x
3. Step 3: Cross multiply
   47,445.88x = 71,160.18 × 21,145.72
4. Step 4: Simplify right side
   47,445.88x = 1,504,733,241.43
5. Step 5: Solve for x
   x = 1,504,733,241.43/47,445.88
6. Step 6: Final answer
   x = 31,714.73