Finding the Third Proportional to 138,403.50 and 302,658

Step by Step Solution

1. Step 1: Write the proportion equation
   138,403.50 : 302,658 = 302,658 : x
2. Step 2: Convert to fraction form
   138,403.50/302,658 = 302,658/x
3. Step 3: Cross multiply
   138,403.50x = 302,658 × 302,658
4. Step 4: Simplify right side
   138,403.50x = 91,601,864,964
5. Step 5: Solve for x
   x = 91,601,864,964/138,403.50
6. Step 6: Final answer
   x = 661,846.45