Finding the Third Proportional to 147,128 and 314,992

Step by Step Solution

1. Step 1: Write the proportion equation
   147,128 : 314,992 = 314,992 : x
2. Step 2: Convert to fraction form
   147,128/314,992 = 314,992/x
3. Step 3: Cross multiply
   147,128x = 314,992 × 314,992
4. Step 4: Simplify right side
   147,128x = 99,219,960,064
5. Step 5: Solve for x
   x = 99,219,960,064/147,128
6. Step 6: Final answer
   x = 674,378.50