Finding the Third Proportional to 419,085.50 and 905,131

Step by Step Solution

1. Step 1: Write the proportion equation
   419,085.50 : 905,131 = 905,131 : x
2. Step 2: Convert to fraction form
   419,085.50/905,131 = 905,131/x
3. Step 3: Cross multiply
   419,085.50x = 905,131 × 905,131
4. Step 4: Simplify right side
   419,085.50x = 819,262,127,161
5. Step 5: Solve for x
   x = 819,262,127,161/419,085.50
6. Step 6: Final answer
   x = 1,954,880.63