Finding the Third Proportional to 58,540 and 90,558

Step by Step Solution

1. Step 1: Write the proportion equation
   58,540 : 90,558 = 90,558 : x
2. Step 2: Convert to fraction form
   58,540/90,558 = 90,558/x
3. Step 3: Cross multiply
   58,540x = 90,558 × 90,558
4. Step 4: Simplify right side
   58,540x = 8,200,751,364
5. Step 5: Solve for x
   x = 8,200,751,364/58,540
6. Step 6: Final answer
   x = 140,088.00