Finding the Third Proportional to 312,219 and 736,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,219 : 736,645.50 = 736,645.50 : x
2. Step 2: Convert to fraction form
   312,219/736,645.50 = 736,645.50/x
3. Step 3: Cross multiply
   312,219x = 736,645.50 × 736,645.50
4. Step 4: Simplify right side
   312,219x = 542,646,592,670.25
5. Step 5: Solve for x
   x = 542,646,592,670.25/312,219
6. Step 6: Final answer
   x = 1,738,031.93