Finding the Third Proportional to 285,120 and 662,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,120 : 662,980.50 = 662,980.50 : x
2. Step 2: Convert to fraction form
   285,120/662,980.50 = 662,980.50/x
3. Step 3: Cross multiply
   285,120x = 662,980.50 × 662,980.50
4. Step 4: Simplify right side
   285,120x = 439,543,143,380.25
5. Step 5: Solve for x
   x = 439,543,143,380.25/285,120
6. Step 6: Final answer
   x = 1,541,607.55