Finding the Fourth Proportional to 31,499.75, 47,249.73 and 21,609.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,499.75 : 47,249.73 = 21,609.05 : x
2. Step 2: Convert to fraction form
   31,499.75/47,249.73 = 21,609.05/x
3. Step 3: Cross multiply
   31,499.75x = 47,249.73 × 21,609.05
4. Step 4: Simplify right side
   31,499.75x = 1,021,021,541.81
5. Step 5: Solve for x
   x = 1,021,021,541.81/31,499.75
6. Step 6: Final answer
   x = 32,413.64