Finding the Third Proportional to 20,602.50 and 42,300

Step by Step Solution

1. Step 1: Write the proportion equation
   20,602.50 : 42,300 = 42,300 : x
2. Step 2: Convert to fraction form
   20,602.50/42,300 = 42,300/x
3. Step 3: Cross multiply
   20,602.50x = 42,300 × 42,300
4. Step 4: Simplify right side
   20,602.50x = 1,789,290,000
5. Step 5: Solve for x
   x = 1,789,290,000/20,602.50
6. Step 6: Final answer
   x = 86,848.20