Finding the Fourth Proportional to 47,131, 64,992.56 and 31,209.64

Step by Step Solution

1. Step 1: Write the proportion equation
   47,131 : 64,992.56 = 31,209.64 : x
2. Step 2: Convert to fraction form
   47,131/64,992.56 = 31,209.64/x
3. Step 3: Cross multiply
   47,131x = 64,992.56 × 31,209.64
4. Step 4: Simplify right side
   47,131x = 2,028,394,400.28
5. Step 5: Solve for x
   x = 2,028,394,400.28/47,131
6. Step 6: Final answer
   x = 43,037.37