Finding the Third Proportional to 291,306 and 623,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,306 : 623,089.50 = 623,089.50 : x
2. Step 2: Convert to fraction form
   291,306/623,089.50 = 623,089.50/x
3. Step 3: Cross multiply
   291,306x = 623,089.50 × 623,089.50
4. Step 4: Simplify right side
   291,306x = 388,240,525,010.25
5. Step 5: Solve for x
   x = 388,240,525,010.25/291,306
6. Step 6: Final answer
   x = 1,332,758.42