Finding the Third Proportional to 61,321.50 and 86,773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,321.50 : 86,773.50 = 86,773.50 : x
2. Step 2: Convert to fraction form
   61,321.50/86,773.50 = 86,773.50/x
3. Step 3: Cross multiply
   61,321.50x = 86,773.50 × 86,773.50
4. Step 4: Simplify right side
   61,321.50x = 7,529,640,302.25
5. Step 5: Solve for x
   x = 7,529,640,302.25/61,321.50
6. Step 6: Final answer
   x = 122,789.56