Finding the Third Proportional to 76,390.50 and 180,610.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,390.50 : 180,610.50 = 180,610.50 : x
2. Step 2: Convert to fraction form
   76,390.50/180,610.50 = 180,610.50/x
3. Step 3: Cross multiply
   76,390.50x = 180,610.50 × 180,610.50
4. Step 4: Simplify right side
   76,390.50x = 32,620,152,710.25
5. Step 5: Solve for x
   x = 32,620,152,710.25/76,390.50
6. Step 6: Final answer
   x = 427,018.45