Finding the Third Proportional to 290,883 and 426,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,883 : 426,748.50 = 426,748.50 : x
2. Step 2: Convert to fraction form
   290,883/426,748.50 = 426,748.50/x
3. Step 3: Cross multiply
   290,883x = 426,748.50 × 426,748.50
4. Step 4: Simplify right side
   290,883x = 182,114,282,252.25
5. Step 5: Solve for x
   x = 182,114,282,252.25/290,883
6. Step 6: Final answer
   x = 626,074.00