Finding the Third Proportional to 138,526.88 and 298,242

Step by Step Solution

1. Step 1: Write the proportion equation
   138,526.88 : 298,242 = 298,242 : x
2. Step 2: Convert to fraction form
   138,526.88/298,242 = 298,242/x
3. Step 3: Cross multiply
   138,526.88x = 298,242 × 298,242
4. Step 4: Simplify right side
   138,526.88x = 88,948,290,564
5. Step 5: Solve for x
   x = 88,948,290,564/138,526.88
6. Step 6: Final answer
   x = 642,101.33