Finding the Third Proportional to 142,531.31 and 307,153.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,531.31 : 307,153.69 = 307,153.69 : x
2. Step 2: Convert to fraction form
   142,531.31/307,153.69 = 307,153.69/x
3. Step 3: Cross multiply
   142,531.31x = 307,153.69 × 307,153.69
4. Step 4: Simplify right side
   142,531.31x = 94,343,387,744.85
5. Step 5: Solve for x
   x = 94,343,387,744.85/142,531.31
6. Step 6: Final answer
   x = 661,913.41