Finding the Third Proportional to 1,388,663 and 2,164,185

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,663 : 2,164,185 = 2,164,185 : x
2. Step 2: Convert to fraction form
   1,388,663/2,164,185 = 2,164,185/x
3. Step 3: Cross multiply
   1,388,663x = 2,164,185 × 2,164,185
4. Step 4: Simplify right side
   1,388,663x = 4,683,696,714,225
5. Step 5: Solve for x
   x = 4,683,696,714,225/1,388,663
6. Step 6: Final answer
   x = 3,372,810.19