Finding the Third Proportional to 275,040 and 437,642.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,040 : 437,642.50 = 437,642.50 : x
2. Step 2: Convert to fraction form
   275,040/437,642.50 = 437,642.50/x
3. Step 3: Cross multiply
   275,040x = 437,642.50 × 437,642.50
4. Step 4: Simplify right side
   275,040x = 191,530,957,806.25
5. Step 5: Solve for x
   x = 191,530,957,806.25/275,040
6. Step 6: Final answer
   x = 696,374.92