Finding the Fourth Proportional to 21,145.97, 31,716.42 and 5,564.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,145.97 : 31,716.42 = 5,564.81 : x
2. Step 2: Convert to fraction form
   21,145.97/31,716.42 = 5,564.81/x
3. Step 3: Cross multiply
   21,145.97x = 31,716.42 × 5,564.81
4. Step 4: Simplify right side
   21,145.97x = 176,495,692.60
5. Step 5: Solve for x
   x = 176,495,692.60/21,145.97
6. Step 6: Final answer
   x = 8,346.54