Finding the Fourth Proportional to 31,798.10, 47,707.56 and 13,086.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,798.10 : 47,707.56 = 13,086.96 : x
2. Step 2: Convert to fraction form
   31,798.10/47,707.56 = 13,086.96/x
3. Step 3: Cross multiply
   31,798.10x = 47,707.56 × 13,086.96
4. Step 4: Simplify right side
   31,798.10x = 624,346,929.42
5. Step 5: Solve for x
   x = 624,346,929.42/31,798.10
6. Step 6: Final answer
   x = 19,634.72