Finding the Third Proportional to 142,042 and 310,810

Step by Step Solution

1. Step 1: Write the proportion equation
   142,042 : 310,810 = 310,810 : x
2. Step 2: Convert to fraction form
   142,042/310,810 = 310,810/x
3. Step 3: Cross multiply
   142,042x = 310,810 × 310,810
4. Step 4: Simplify right side
   142,042x = 96,602,856,100
5. Step 5: Solve for x
   x = 96,602,856,100/142,042
6. Step 6: Final answer
   x = 680,100.65