Finding the Third Proportional to 59,580 and 87,423

Step by Step Solution

1. Step 1: Write the proportion equation
   59,580 : 87,423 = 87,423 : x
2. Step 2: Convert to fraction form
   59,580/87,423 = 87,423/x
3. Step 3: Cross multiply
   59,580x = 87,423 × 87,423
4. Step 4: Simplify right side
   59,580x = 7,642,780,929
5. Step 5: Solve for x
   x = 7,642,780,929/59,580
6. Step 6: Final answer
   x = 128,277.63