Finding the Third Proportional to 58,381.50 and 90,306

Step by Step Solution

1. Step 1: Write the proportion equation
   58,381.50 : 90,306 = 90,306 : x
2. Step 2: Convert to fraction form
   58,381.50/90,306 = 90,306/x
3. Step 3: Cross multiply
   58,381.50x = 90,306 × 90,306
4. Step 4: Simplify right side
   58,381.50x = 8,155,173,636
5. Step 5: Solve for x
   x = 8,155,173,636/58,381.50
6. Step 6: Final answer
   x = 139,687.63