Finding the Third Proportional to 447,121 and 697,897.50

Step by Step Solution

1. Step 1: Write the proportion equation
   447,121 : 697,897.50 = 697,897.50 : x
2. Step 2: Convert to fraction form
   447,121/697,897.50 = 697,897.50/x
3. Step 3: Cross multiply
   447,121x = 697,897.50 × 697,897.50
4. Step 4: Simplify right side
   447,121x = 487,060,920,506.25
5. Step 5: Solve for x
   x = 487,060,920,506.25/447,121
6. Step 6: Final answer
   x = 1,089,326.87