Finding the Third Proportional to 388,784.50 and 852,302.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,784.50 : 852,302.50 = 852,302.50 : x
2. Step 2: Convert to fraction form
   388,784.50/852,302.50 = 852,302.50/x
3. Step 3: Cross multiply
   388,784.50x = 852,302.50 × 852,302.50
4. Step 4: Simplify right side
   388,784.50x = 726,419,551,506.25
5. Step 5: Solve for x
   x = 726,419,551,506.25/388,784.50
6. Step 6: Final answer
   x = 1,868,437.53