Finding the Third Proportional to 138,078 and 297,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,078 : 297,940.50 = 297,940.50 : x
2. Step 2: Convert to fraction form
   138,078/297,940.50 = 297,940.50/x
3. Step 3: Cross multiply
   138,078x = 297,940.50 × 297,940.50
4. Step 4: Simplify right side
   138,078x = 88,768,541,540.25
5. Step 5: Solve for x
   x = 88,768,541,540.25/138,078
6. Step 6: Final answer
   x = 642,886.93