Finding the Third Proportional to 142,308 and 316,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308 : 316,120.50 = 316,120.50 : x
2. Step 2: Convert to fraction form
   142,308/316,120.50 = 316,120.50/x
3. Step 3: Cross multiply
   142,308x = 316,120.50 × 316,120.50
4. Step 4: Simplify right side
   142,308x = 99,932,170,520.25
5. Step 5: Solve for x
   x = 99,932,170,520.25/142,308
6. Step 6: Final answer
   x = 702,224.54