Finding the Third Proportional to 56,721 and 83,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,721 : 83,443.50 = 83,443.50 : x
2. Step 2: Convert to fraction form
   56,721/83,443.50 = 83,443.50/x
3. Step 3: Cross multiply
   56,721x = 83,443.50 × 83,443.50
4. Step 4: Simplify right side
   56,721x = 6,962,817,692.25
5. Step 5: Solve for x
   x = 6,962,817,692.25/56,721
6. Step 6: Final answer
   x = 122,755.55