Finding the Third Proportional to 66,142 and 99,810

Step by Step Solution

1. Step 1: Write the proportion equation
   66,142 : 99,810 = 99,810 : x
2. Step 2: Convert to fraction form
   66,142/99,810 = 99,810/x
3. Step 3: Cross multiply
   66,142x = 99,810 × 99,810
4. Step 4: Simplify right side
   66,142x = 9,962,036,100
5. Step 5: Solve for x
   x = 9,962,036,100/66,142
6. Step 6: Final answer
   x = 150,615.89