Finding the Fourth Proportional to 21,116.34, 31,663.77 and 7,071.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116.34 : 31,663.77 = 7,071.32 : x
2. Step 2: Convert to fraction form
   21,116.34/31,663.77 = 7,071.32/x
3. Step 3: Cross multiply
   21,116.34x = 31,663.77 × 7,071.32
4. Step 4: Simplify right side
   21,116.34x = 223,904,491.76
5. Step 5: Solve for x
   x = 223,904,491.76/21,116.34
6. Step 6: Final answer
   x = 10,603.38