Finding the Third Proportional to 391,185 and 857,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   391,185 : 857,101.50 = 857,101.50 : x
2. Step 2: Convert to fraction form
   391,185/857,101.50 = 857,101.50/x
3. Step 3: Cross multiply
   391,185x = 857,101.50 × 857,101.50
4. Step 4: Simplify right side
   391,185x = 734,622,981,302.25
5. Step 5: Solve for x
   x = 734,622,981,302.25/391,185
6. Step 6: Final answer
   x = 1,877,942.61