Finding the Third Proportional to 155,256.50 and 316,222

Step by Step Solution

1. Step 1: Write the proportion equation
   155,256.50 : 316,222 = 316,222 : x
2. Step 2: Convert to fraction form
   155,256.50/316,222 = 316,222/x
3. Step 3: Cross multiply
   155,256.50x = 316,222 × 316,222
4. Step 4: Simplify right side
   155,256.50x = 99,996,353,284
5. Step 5: Solve for x
   x = 99,996,353,284/155,256.50
6. Step 6: Final answer
   x = 644,071.93