Finding the Third Proportional to 368,145 and 788,737.50

Step by Step Solution

1. Step 1: Write the proportion equation
   368,145 : 788,737.50 = 788,737.50 : x
2. Step 2: Convert to fraction form
   368,145/788,737.50 = 788,737.50/x
3. Step 3: Cross multiply
   368,145x = 788,737.50 × 788,737.50
4. Step 4: Simplify right side
   368,145x = 622,106,843,906.25
5. Step 5: Solve for x
   x = 622,106,843,906.25/368,145
6. Step 6: Final answer
   x = 1,689,841.89