Finding the Third Proportional to 58,200 and 87,300

Step by Step Solution

1. Step 1: Write the proportion equation
   58,200 : 87,300 = 87,300 : x
2. Step 2: Convert to fraction form
   58,200/87,300 = 87,300/x
3. Step 3: Cross multiply
   58,200x = 87,300 × 87,300
4. Step 4: Simplify right side
   58,200x = 7,621,290,000
5. Step 5: Solve for x
   x = 7,621,290,000/58,200
6. Step 6: Final answer
   x = 130,950