Finding the Fourth Proportional to 31,780.21, 47,659.85 and 10,714.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,780.21 : 47,659.85 = 10,714.56 : x
2. Step 2: Convert to fraction form
   31,780.21/47,659.85 = 10,714.56/x
3. Step 3: Cross multiply
   31,780.21x = 47,659.85 × 10,714.56
4. Step 4: Simplify right side
   31,780.21x = 510,654,322.42
5. Step 5: Solve for x
   x = 510,654,322.42/31,780.21
6. Step 6: Final answer
   x = 16,068.31