Finding the Third Proportional to 162,807 and 252,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   162,807 : 252,064.50 = 252,064.50 : x
2. Step 2: Convert to fraction form
   162,807/252,064.50 = 252,064.50/x
3. Step 3: Cross multiply
   162,807x = 252,064.50 × 252,064.50
4. Step 4: Simplify right side
   162,807x = 63,536,512,160.25
5. Step 5: Solve for x
   x = 63,536,512,160.25/162,807
6. Step 6: Final answer
   x = 390,256.64