Finding the Third Proportional to 149,700 and 323,139

Step by Step Solution

1. Step 1: Write the proportion equation
   149,700 : 323,139 = 323,139 : x
2. Step 2: Convert to fraction form
   149,700/323,139 = 323,139/x
3. Step 3: Cross multiply
   149,700x = 323,139 × 323,139
4. Step 4: Simplify right side
   149,700x = 104,418,813,321
5. Step 5: Solve for x
   x = 104,418,813,321/149,700
6. Step 6: Final answer
   x = 697,520.46