Finding the Third Proportional to 178,687 and 276,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   178,687 : 276,427.50 = 276,427.50 : x
2. Step 2: Convert to fraction form
   178,687/276,427.50 = 276,427.50/x
3. Step 3: Cross multiply
   178,687x = 276,427.50 × 276,427.50
4. Step 4: Simplify right side
   178,687x = 76,412,162,756.25
5. Step 5: Solve for x
   x = 76,412,162,756.25/178,687
6. Step 6: Final answer
   x = 427,631.35