Finding the Third Proportional to 139,360.50 and 298,397.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,360.50 : 298,397.25 = 298,397.25 : x
2. Step 2: Convert to fraction form
   139,360.50/298,397.25 = 298,397.25/x
3. Step 3: Cross multiply
   139,360.50x = 298,397.25 × 298,397.25
4. Step 4: Simplify right side
   139,360.50x = 89,040,918,807.56
5. Step 5: Solve for x
   x = 89,040,918,807.56/139,360.50
6. Step 6: Final answer
   x = 638,925.08