Finding the Third Proportional to 59,479 and 87,574

Step by Step Solution

1. Step 1: Write the proportion equation
   59,479 : 87,574 = 87,574 : x
2. Step 2: Convert to fraction form
   59,479/87,574 = 87,574/x
3. Step 3: Cross multiply
   59,479x = 87,574 × 87,574
4. Step 4: Simplify right side
   59,479x = 7,669,205,476
5. Step 5: Solve for x
   x = 7,669,205,476/59,479
6. Step 6: Final answer
   x = 128,939.72