Finding the Third Proportional to 142,807 and 308,159

Step by Step Solution

1. Step 1: Write the proportion equation
   142,807 : 308,159 = 308,159 : x
2. Step 2: Convert to fraction form
   142,807/308,159 = 308,159/x
3. Step 3: Cross multiply
   142,807x = 308,159 × 308,159
4. Step 4: Simplify right side
   142,807x = 94,961,969,281
5. Step 5: Solve for x
   x = 94,961,969,281/142,807
6. Step 6: Final answer
   x = 664,967.19