Finding the Third Proportional to 387,463.50 and 849,690

Step by Step Solution

1. Step 1: Write the proportion equation
   387,463.50 : 849,690 = 849,690 : x
2. Step 2: Convert to fraction form
   387,463.50/849,690 = 849,690/x
3. Step 3: Cross multiply
   387,463.50x = 849,690 × 849,690
4. Step 4: Simplify right side
   387,463.50x = 721,973,096,100
5. Step 5: Solve for x
   x = 721,973,096,100/387,463.50
6. Step 6: Final answer
   x = 1,863,331.89