Finding the Third Proportional to 138,078 and 297,884.25

Step by Step Solution

1. Step 1: Write the proportion equation
   138,078 : 297,884.25 = 297,884.25 : x
2. Step 2: Convert to fraction form
   138,078/297,884.25 = 297,884.25/x
3. Step 3: Cross multiply
   138,078x = 297,884.25 × 297,884.25
4. Step 4: Simplify right side
   138,078x = 88,735,026,398.06
5. Step 5: Solve for x
   x = 88,735,026,398.06/138,078
6. Step 6: Final answer
   x = 642,644.20