Finding the Third Proportional to 385,815 and 846,334.50

Step by Step Solution

1. Step 1: Write the proportion equation
   385,815 : 846,334.50 = 846,334.50 : x
2. Step 2: Convert to fraction form
   385,815/846,334.50 = 846,334.50/x
3. Step 3: Cross multiply
   385,815x = 846,334.50 × 846,334.50
4. Step 4: Simplify right side
   385,815x = 716,282,085,890.25
5. Step 5: Solve for x
   x = 716,282,085,890.25/385,815
6. Step 6: Final answer
   x = 1,856,542.87