Finding the Third Proportional to 81,011.75 and 111,248.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,011.75 : 111,248.50 = 111,248.50 : x
2. Step 2: Convert to fraction form
   81,011.75/111,248.50 = 111,248.50/x
3. Step 3: Cross multiply
   81,011.75x = 111,248.50 × 111,248.50
4. Step 4: Simplify right side
   81,011.75x = 12,376,228,752.25
5. Step 5: Solve for x
   x = 12,376,228,752.25/81,011.75
6. Step 6: Final answer
   x = 152,770.79