Finding the Third Proportional to 290,881 and 426,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,881 : 426,745.50 = 426,745.50 : x
2. Step 2: Convert to fraction form
   290,881/426,745.50 = 426,745.50/x
3. Step 3: Cross multiply
   290,881x = 426,745.50 × 426,745.50
4. Step 4: Simplify right side
   290,881x = 182,111,721,770.25
5. Step 5: Solve for x
   x = 182,111,721,770.25/290,881
6. Step 6: Final answer
   x = 626,069.50