Finding the Third Proportional to 142,155 and 307,080

Step by Step Solution

1. Step 1: Write the proportion equation
   142,155 : 307,080 = 307,080 : x
2. Step 2: Convert to fraction form
   142,155/307,080 = 307,080/x
3. Step 3: Cross multiply
   142,155x = 307,080 × 307,080
4. Step 4: Simplify right side
   142,155x = 94,298,126,400
5. Step 5: Solve for x
   x = 94,298,126,400/142,155
6. Step 6: Final answer
   x = 663,347.24