Finding the Third Proportional to 139,955.25 and 299,876.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,955.25 : 299,876.25 = 299,876.25 : x
2. Step 2: Convert to fraction form
   139,955.25/299,876.25 = 299,876.25/x
3. Step 3: Cross multiply
   139,955.25x = 299,876.25 × 299,876.25
4. Step 4: Simplify right side
   139,955.25x = 89,925,765,314.06
5. Step 5: Solve for x
   x = 89,925,765,314.06/139,955.25
6. Step 6: Final answer
   x = 642,532.28