Finding the Third Proportional to 290,784 and 626,064

Step by Step Solution

1. Step 1: Write the proportion equation
   290,784 : 626,064 = 626,064 : x
2. Step 2: Convert to fraction form
   290,784/626,064 = 626,064/x
3. Step 3: Cross multiply
   290,784x = 626,064 × 626,064
4. Step 4: Simplify right side
   290,784x = 391,956,132,096
5. Step 5: Solve for x
   x = 391,956,132,096/290,784
6. Step 6: Final answer
   x = 1,347,928.81