Finding the Third Proportional to 405,137 and 873,071.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405,137 : 873,071.50 = 873,071.50 : x
2. Step 2: Convert to fraction form
   405,137/873,071.50 = 873,071.50/x
3. Step 3: Cross multiply
   405,137x = 873,071.50 × 873,071.50
4. Step 4: Simplify right side
   405,137x = 762,253,844,112.25
5. Step 5: Solve for x
   x = 762,253,844,112.25/405,137
6. Step 6: Final answer
   x = 1,881,471.81