Finding the Third Proportional to 217,111.50 and 344,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,111.50 : 344,611.50 = 344,611.50 : x
2. Step 2: Convert to fraction form
   217,111.50/344,611.50 = 344,611.50/x
3. Step 3: Cross multiply
   217,111.50x = 344,611.50 × 344,611.50
4. Step 4: Simplify right side
   217,111.50x = 118,757,085,932.25
5. Step 5: Solve for x
   x = 118,757,085,932.25/217,111.50
6. Step 6: Final answer
   x = 546,986.62