Finding the Third Proportional to 59,078 and 87,690

Step by Step Solution

1. Step 1: Write the proportion equation
   59,078 : 87,690 = 87,690 : x
2. Step 2: Convert to fraction form
   59,078/87,690 = 87,690/x
3. Step 3: Cross multiply
   59,078x = 87,690 × 87,690
4. Step 4: Simplify right side
   59,078x = 7,689,536,100
5. Step 5: Solve for x
   x = 7,689,536,100/59,078
6. Step 6: Final answer
   x = 130,159.05