Finding the Third Proportional to 208,434.50 and 426,696.50

Step by Step Solution

1. Step 1: Write the proportion equation
   208,434.50 : 426,696.50 = 426,696.50 : x
2. Step 2: Convert to fraction form
   208,434.50/426,696.50 = 426,696.50/x
3. Step 3: Cross multiply
   208,434.50x = 426,696.50 × 426,696.50
4. Step 4: Simplify right side
   208,434.50x = 182,069,903,112.25
5. Step 5: Solve for x
   x = 182,069,903,112.25/208,434.50
6. Step 6: Final answer
   x = 873,511.36