Finding the Third Proportional to 81,492 and 109,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,492 : 109,864.50 = 109,864.50 : x
2. Step 2: Convert to fraction form
   81,492/109,864.50 = 109,864.50/x
3. Step 3: Cross multiply
   81,492x = 109,864.50 × 109,864.50
4. Step 4: Simplify right side
   81,492x = 12,070,208,360.25
5. Step 5: Solve for x
   x = 12,070,208,360.25/81,492
6. Step 6: Final answer
   x = 148,115.25