Finding the Third Proportional to 421,860 and 910,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   421,860 : 910,018.50 = 910,018.50 : x
2. Step 2: Convert to fraction form
   421,860/910,018.50 = 910,018.50/x
3. Step 3: Cross multiply
   421,860x = 910,018.50 × 910,018.50
4. Step 4: Simplify right side
   421,860x = 828,133,670,342.25
5. Step 5: Solve for x
   x = 828,133,670,342.25/421,860
6. Step 6: Final answer
   x = 1,963,053.31