Finding the Third Proportional to 274,078 and 578,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   274,078 : 578,147.50 = 578,147.50 : x
2. Step 2: Convert to fraction form
   274,078/578,147.50 = 578,147.50/x
3. Step 3: Cross multiply
   274,078x = 578,147.50 × 578,147.50
4. Step 4: Simplify right side
   274,078x = 334,254,531,756.25
5. Step 5: Solve for x
   x = 334,254,531,756.25/274,078
6. Step 6: Final answer
   x = 1,219,559.88