Finding the Third Proportional to 401,787 and 607,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,787 : 607,864.50 = 607,864.50 : x
2. Step 2: Convert to fraction form
   401,787/607,864.50 = 607,864.50/x
3. Step 3: Cross multiply
   401,787x = 607,864.50 × 607,864.50
4. Step 4: Simplify right side
   401,787x = 369,499,250,360.25
5. Step 5: Solve for x
   x = 369,499,250,360.25/401,787
6. Step 6: Final answer
   x = 919,639.64