Finding the Fourth Proportional to 21,162.14, 31,731.93 and 7,117.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,162.14 : 31,731.93 = 7,117.50 : x
2. Step 2: Convert to fraction form
   21,162.14/31,731.93 = 7,117.50/x
3. Step 3: Cross multiply
   21,162.14x = 31,731.93 × 7,117.50
4. Step 4: Simplify right side
   21,162.14x = 225,851,843.01
5. Step 5: Solve for x
   x = 225,851,843.01/21,162.14
6. Step 6: Final answer
   x = 10,672.45