Finding the Third Proportional to 58,405.50 and 90,625.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,405.50 : 90,625.50 = 90,625.50 : x
2. Step 2: Convert to fraction form
   58,405.50/90,625.50 = 90,625.50/x
3. Step 3: Cross multiply
   58,405.50x = 90,625.50 × 90,625.50
4. Step 4: Simplify right side
   58,405.50x = 8,212,981,250.25
5. Step 5: Solve for x
   x = 8,212,981,250.25/58,405.50
6. Step 6: Final answer
   x = 140,620.00