Finding the Third Proportional to 155,158 and 221,467.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,158 : 221,467.50 = 221,467.50 : x
2. Step 2: Convert to fraction form
   155,158/221,467.50 = 221,467.50/x
3. Step 3: Cross multiply
   155,158x = 221,467.50 × 221,467.50
4. Step 4: Simplify right side
   155,158x = 49,047,853,556.25
5. Step 5: Solve for x
   x = 49,047,853,556.25/155,158
6. Step 6: Final answer
   x = 316,115.53