Finding the Fourth Proportional to 31,631.61, 47,431.27 and 10,564.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,631.61 : 47,431.27 = 10,564.06 : x
2. Step 2: Convert to fraction form
   31,631.61/47,431.27 = 10,564.06/x
3. Step 3: Cross multiply
   31,631.61x = 47,431.27 × 10,564.06
4. Step 4: Simplify right side
   31,631.61x = 501,066,676.78
5. Step 5: Solve for x
   x = 501,066,676.78/31,631.61
6. Step 6: Final answer
   x = 15,840.70