Finding the Fourth Proportional to 21,142.82, 31,715.62 and 7,101.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.82 : 31,715.62 = 7,101.74 : x
2. Step 2: Convert to fraction form
   21,142.82/31,715.62 = 7,101.74/x
3. Step 3: Cross multiply
   21,142.82x = 31,715.62 × 7,101.74
4. Step 4: Simplify right side
   21,142.82x = 225,236,148.71
5. Step 5: Solve for x
   x = 225,236,148.71/21,142.82
6. Step 6: Final answer
   x = 10,653.08