Finding the Third Proportional to 148,911 and 321,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,911 : 321,148.50 = 321,148.50 : x
2. Step 2: Convert to fraction form
   148,911/321,148.50 = 321,148.50/x
3. Step 3: Cross multiply
   148,911x = 321,148.50 × 321,148.50
4. Step 4: Simplify right side
   148,911x = 103,136,359,052.25
5. Step 5: Solve for x
   x = 103,136,359,052.25/148,911
6. Step 6: Final answer
   x = 692,604.03