Finding the Third Proportional to 81,720 and 112,529.25

Step by Step Solution

1. Step 1: Write the proportion equation
   81,720 : 112,529.25 = 112,529.25 : x
2. Step 2: Convert to fraction form
   81,720/112,529.25 = 112,529.25/x
3. Step 3: Cross multiply
   81,720x = 112,529.25 × 112,529.25
4. Step 4: Simplify right side
   81,720x = 12,662,832,105.56
5. Step 5: Solve for x
   x = 12,662,832,105.56/81,720
6. Step 6: Final answer
   x = 154,953.89