Finding the Third Proportional to 149,486 and 218,472.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,486 : 218,472.50 = 218,472.50 : x
2. Step 2: Convert to fraction form
   149,486/218,472.50 = 218,472.50/x
3. Step 3: Cross multiply
   149,486x = 218,472.50 × 218,472.50
4. Step 4: Simplify right side
   149,486x = 47,730,233,256.25
5. Step 5: Solve for x
   x = 47,730,233,256.25/149,486
6. Step 6: Final answer
   x = 319,295.67