Finding the Third Proportional to 58,857 and 89,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,857 : 89,645.50 = 89,645.50 : x
2. Step 2: Convert to fraction form
   58,857/89,645.50 = 89,645.50/x
3. Step 3: Cross multiply
   58,857x = 89,645.50 × 89,645.50
4. Step 4: Simplify right side
   58,857x = 8,036,315,670.25
5. Step 5: Solve for x
   x = 8,036,315,670.25/58,857
6. Step 6: Final answer
   x = 136,539.68