Finding the Third Proportional to 556,554 and 839,995.50

Step by Step Solution

1. Step 1: Write the proportion equation
   556,554 : 839,995.50 = 839,995.50 : x
2. Step 2: Convert to fraction form
   556,554/839,995.50 = 839,995.50/x
3. Step 3: Cross multiply
   556,554x = 839,995.50 × 839,995.50
4. Step 4: Simplify right side
   556,554x = 705,592,440,020.25
5. Step 5: Solve for x
   x = 705,592,440,020.25/556,554
6. Step 6: Final answer
   x = 1,267,787.92