Finding the Fourth Proportional to 21,139.56, 31,714.02 and 7,100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,139.56 : 31,714.02 = 7,100.10 : x
2. Step 2: Convert to fraction form
   21,139.56/31,714.02 = 7,100.10/x
3. Step 3: Cross multiply
   21,139.56x = 31,714.02 × 7,100.10
4. Step 4: Simplify right side
   21,139.56x = 225,172,713.40
5. Step 5: Solve for x
   x = 225,172,713.40/21,139.56
6. Step 6: Final answer
   x = 10,651.72