Finding the Fourth Proportional to 21,146.88, 31,716.72 and 5,564.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,146.88 : 31,716.72 = 5,564.64 : x
2. Step 2: Convert to fraction form
   21,146.88/31,716.72 = 5,564.64/x
3. Step 3: Cross multiply
   21,146.88x = 31,716.72 × 5,564.64
4. Step 4: Simplify right side
   21,146.88x = 176,492,128.78
5. Step 5: Solve for x
   x = 176,492,128.78/21,146.88
6. Step 6: Final answer
   x = 8,346.01