Finding the Third Proportional to 405,136 and 873,069.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405,136 : 873,069.50 = 873,069.50 : x
2. Step 2: Convert to fraction form
   405,136/873,069.50 = 873,069.50/x
3. Step 3: Cross multiply
   405,136x = 873,069.50 × 873,069.50
4. Step 4: Simplify right side
   405,136x = 762,250,351,830.25
5. Step 5: Solve for x
   x = 762,250,351,830.25/405,136
6. Step 6: Final answer
   x = 1,881,467.83