Finding the Third Proportional to 55,234.13 and 86,405.63

Step by Step Solution

1. Step 1: Write the proportion equation
   55,234.13 : 86,405.63 = 86,405.63 : x
2. Step 2: Convert to fraction form
   55,234.13/86,405.63 = 86,405.63/x
3. Step 3: Cross multiply
   55,234.13x = 86,405.63 × 86,405.63
4. Step 4: Simplify right side
   55,234.13x = 7,465,932,031.64
5. Step 5: Solve for x
   x = 7,465,932,031.64/55,234.13
6. Step 6: Final answer
   x = 135,168.83