Finding the Third Proportional to 142,188 and 307,140

Step by Step Solution

1. Step 1: Write the proportion equation
   142,188 : 307,140 = 307,140 : x
2. Step 2: Convert to fraction form
   142,188/307,140 = 307,140/x
3. Step 3: Cross multiply
   142,188x = 307,140 × 307,140
4. Step 4: Simplify right side
   142,188x = 94,334,979,600
5. Step 5: Solve for x
   x = 94,334,979,600/142,188
6. Step 6: Final answer
   x = 663,452.47