Finding the Third Proportional to 56,697.75 and 86,690.25

Step by Step Solution

1. Step 1: Write the proportion equation
   56,697.75 : 86,690.25 = 86,690.25 : x
2. Step 2: Convert to fraction form
   56,697.75/86,690.25 = 86,690.25/x
3. Step 3: Cross multiply
   56,697.75x = 86,690.25 × 86,690.25
4. Step 4: Simplify right side
   56,697.75x = 7,515,199,445.06
5. Step 5: Solve for x
   x = 7,515,199,445.06/56,697.75
6. Step 6: Final answer
   x = 132,548.46