Finding the Third Proportional to 345,078 and 738,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,078 : 738,130.50 = 738,130.50 : x
2. Step 2: Convert to fraction form
   345,078/738,130.50 = 738,130.50/x
3. Step 3: Cross multiply
   345,078x = 738,130.50 × 738,130.50
4. Step 4: Simplify right side
   345,078x = 544,836,635,030.25
5. Step 5: Solve for x
   x = 544,836,635,030.25/345,078
6. Step 6: Final answer
   x = 1,578,879.66