Finding the Third Proportional to 57,603 and 86,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,603 : 86,404.50 = 86,404.50 : x
2. Step 2: Convert to fraction form
   57,603/86,404.50 = 86,404.50/x
3. Step 3: Cross multiply
   57,603x = 86,404.50 × 86,404.50
4. Step 4: Simplify right side
   57,603x = 7,465,737,620.25
5. Step 5: Solve for x
   x = 7,465,737,620.25/57,603
6. Step 6: Final answer
   x = 129,606.75