Finding the Third Proportional to 56,871 and 86,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,871 : 86,089.50 = 86,089.50 : x
2. Step 2: Convert to fraction form
   56,871/86,089.50 = 86,089.50/x
3. Step 3: Cross multiply
   56,871x = 86,089.50 × 86,089.50
4. Step 4: Simplify right side
   56,871x = 7,411,402,010.25
5. Step 5: Solve for x
   x = 7,411,402,010.25/56,871
6. Step 6: Final answer
   x = 130,319.53