Finding the Third Proportional to 58,600 and 90,680

Step by Step Solution

1. Step 1: Write the proportion equation
   58,600 : 90,680 = 90,680 : x
2. Step 2: Convert to fraction form
   58,600/90,680 = 90,680/x
3. Step 3: Cross multiply
   58,600x = 90,680 × 90,680
4. Step 4: Simplify right side
   58,600x = 8,222,862,400
5. Step 5: Solve for x
   x = 8,222,862,400/58,600
6. Step 6: Final answer
   x = 140,321.88