Finding the Third Proportional to 56,345.63 and 86,644.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,345.63 : 86,644.69 = 86,644.69 : x
2. Step 2: Convert to fraction form
   56,345.63/86,644.69 = 86,644.69/x
3. Step 3: Cross multiply
   56,345.63x = 86,644.69 × 86,644.69
4. Step 4: Simplify right side
   56,345.63x = 7,507,301,871.97
5. Step 5: Solve for x
   x = 7,507,301,871.97/56,345.63
6. Step 6: Final answer
   x = 133,236.64