Finding the Third Proportional to 53,802.56 and 68,218.03

Step by Step Solution

1. Step 1: Write the proportion equation
   53,802.56 : 68,218.03 = 68,218.03 : x
2. Step 2: Convert to fraction form
   53,802.56/68,218.03 = 68,218.03/x
3. Step 3: Cross multiply
   53,802.56x = 68,218.03 × 68,218.03
4. Step 4: Simplify right side
   53,802.56x = 4,653,699,787.63
5. Step 5: Solve for x
   x = 4,653,699,787.63/53,802.56
6. Step 6: Final answer
   x = 86,495.88