Finding the Third Proportional to 603,438 and 911,307.75

Step by Step Solution

1. Step 1: Write the proportion equation
   603,438 : 911,307.75 = 911,307.75 : x
2. Step 2: Convert to fraction form
   603,438/911,307.75 = 911,307.75/x
3. Step 3: Cross multiply
   603,438x = 911,307.75 × 911,307.75
4. Step 4: Simplify right side
   603,438x = 830,481,815,210.06
5. Step 5: Solve for x
   x = 830,481,815,210.06/603,438
6. Step 6: Final answer
   x = 1,376,250.44