Finding the Third Proportional to 53,213.63 and 81,817.59

Step by Step Solution

1. Step 1: Write the proportion equation
   53,213.63 : 81,817.59 = 81,817.59 : x
2. Step 2: Convert to fraction form
   53,213.63/81,817.59 = 81,817.59/x
3. Step 3: Cross multiply
   53,213.63x = 81,817.59 × 81,817.59
4. Step 4: Simplify right side
   53,213.63x = 6,694,118,647.04
5. Step 5: Solve for x
   x = 6,694,118,647.04/53,213.63
6. Step 6: Final answer
   x = 125,797.08