Finding the Third Proportional to 388,215 and 848,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,215 : 848,398.50 = 848,398.50 : x
2. Step 2: Convert to fraction form
   388,215/848,398.50 = 848,398.50/x
3. Step 3: Cross multiply
   388,215x = 848,398.50 × 848,398.50
4. Step 4: Simplify right side
   388,215x = 719,780,014,802.25
5. Step 5: Solve for x
   x = 719,780,014,802.25/388,215
6. Step 6: Final answer
   x = 1,854,075.74