Finding the Third Proportional to 55,616.63 and 86,190.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,616.63 : 86,190.75 = 86,190.75 : x
2. Step 2: Convert to fraction form
   55,616.63/86,190.75 = 86,190.75/x
3. Step 3: Cross multiply
   55,616.63x = 86,190.75 × 86,190.75
4. Step 4: Simplify right side
   55,616.63x = 7,428,845,385.56
5. Step 5: Solve for x
   x = 7,428,845,385.56/55,616.63
6. Step 6: Final answer
   x = 133,572.39