Finding the Third Proportional to 291,280.50 and 623,040

Step by Step Solution

1. Step 1: Write the proportion equation
   291,280.50 : 623,040 = 623,040 : x
2. Step 2: Convert to fraction form
   291,280.50/623,040 = 623,040/x
3. Step 3: Cross multiply
   291,280.50x = 623,040 × 623,040
4. Step 4: Simplify right side
   291,280.50x = 388,178,841,600
5. Step 5: Solve for x
   x = 388,178,841,600/291,280.50
6. Step 6: Final answer
   x = 1,332,663.33