Finding the Third Proportional to 368,806.50 and 556,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   368,806.50 : 556,591.50 = 556,591.50 : x
2. Step 2: Convert to fraction form
   368,806.50/556,591.50 = 556,591.50/x
3. Step 3: Cross multiply
   368,806.50x = 556,591.50 × 556,591.50
4. Step 4: Simplify right side
   368,806.50x = 309,794,097,872.25
5. Step 5: Solve for x
   x = 309,794,097,872.25/368,806.50
6. Step 6: Final answer
   x = 839,990.88