Finding the Third Proportional to 58,408.50 and 90,630

Step by Step Solution

1. Step 1: Write the proportion equation
   58,408.50 : 90,630 = 90,630 : x
2. Step 2: Convert to fraction form
   58,408.50/90,630 = 90,630/x
3. Step 3: Cross multiply
   58,408.50x = 90,630 × 90,630
4. Step 4: Simplify right side
   58,408.50x = 8,213,796,900
5. Step 5: Solve for x
   x = 8,213,796,900/58,408.50
6. Step 6: Final answer
   x = 140,626.74