Finding the Third Proportional to 155,815.21 and 222,796.35

Step by Step Solution

1. Step 1: Write the proportion equation
   155,815.21 : 222,796.35 = 222,796.35 : x
2. Step 2: Convert to fraction form
   155,815.21/222,796.35 = 222,796.35/x
3. Step 3: Cross multiply
   155,815.21x = 222,796.35 × 222,796.35
4. Step 4: Simplify right side
   155,815.21x = 49,638,215,139.86
5. Step 5: Solve for x
   x = 49,638,215,139.86/155,815.21
6. Step 6: Final answer
   x = 318,571.06