Finding the Third Proportional to 51,357.94 and 81,492.19

Step by Step Solution

1. Step 1: Write the proportion equation
   51,357.94 : 81,492.19 = 81,492.19 : x
2. Step 2: Convert to fraction form
   51,357.94/81,492.19 = 81,492.19/x
3. Step 3: Cross multiply
   51,357.94x = 81,492.19 × 81,492.19
4. Step 4: Simplify right side
   51,357.94x = 6,640,976,623.54
5. Step 5: Solve for x
   x = 6,640,976,623.54/51,357.94
6. Step 6: Final answer
   x = 129,307.70