Finding the Third Proportional to 290,364 and 426,976.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,364 : 426,976.50 = 426,976.50 : x
2. Step 2: Convert to fraction form
   290,364/426,976.50 = 426,976.50/x
3. Step 3: Cross multiply
   290,364x = 426,976.50 × 426,976.50
4. Step 4: Simplify right side
   290,364x = 182,308,931,552.25
5. Step 5: Solve for x
   x = 182,308,931,552.25/290,364
6. Step 6: Final answer
   x = 627,863.41