Finding the Third Proportional to 623,128 and 1,355,600

Step by Step Solution

1. Step 1: Write the proportion equation
   623,128 : 1,355,600 = 1,355,600 : x
2. Step 2: Convert to fraction form
   623,128/1,355,600 = 1,355,600/x
3. Step 3: Cross multiply
   623,128x = 1,355,600 × 1,355,600
4. Step 4: Simplify right side
   623,128x = 1,837,651,360,000
5. Step 5: Solve for x
   x = 1,837,651,360,000/623,128
6. Step 6: Final answer
   x = 2,949,075.25