Finding the Third Proportional to 139,151.25 and 297,978.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,151.25 : 297,978.75 = 297,978.75 : x
2. Step 2: Convert to fraction form
   139,151.25/297,978.75 = 297,978.75/x
3. Step 3: Cross multiply
   139,151.25x = 297,978.75 × 297,978.75
4. Step 4: Simplify right side
   139,151.25x = 88,791,335,451.56
5. Step 5: Solve for x
   x = 88,791,335,451.56/139,151.25
6. Step 6: Final answer
   x = 638,092.26