Finding the Third Proportional to 603,555 and 911,482.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,555 : 911,482.50 = 911,482.50 : x
2. Step 2: Convert to fraction form
   603,555/911,482.50 = 911,482.50/x
3. Step 3: Cross multiply
   603,555x = 911,482.50 × 911,482.50
4. Step 4: Simplify right side
   603,555x = 830,800,347,806.25
5. Step 5: Solve for x
   x = 830,800,347,806.25/603,555
6. Step 6: Final answer
   x = 1,376,511.42