Finding the Third Proportional to 31,917.60 and 50,990.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,917.60 : 50,990.31 = 50,990.31 : x
2. Step 2: Convert to fraction form
   31,917.60/50,990.31 = 50,990.31/x
3. Step 3: Cross multiply
   31,917.60x = 50,990.31 × 50,990.31
4. Step 4: Simplify right side
   31,917.60x = 2,600,011,794.56
5. Step 5: Solve for x
   x = 2,600,011,794.56/31,917.60
6. Step 6: Final answer
   x = 81,460.13