Finding the Third Proportional to 316,903.50 and 491,445

Step by Step Solution

1. Step 1: Write the proportion equation
   316,903.50 : 491,445 = 491,445 : x
2. Step 2: Convert to fraction form
   316,903.50/491,445 = 491,445/x
3. Step 3: Cross multiply
   316,903.50x = 491,445 × 491,445
4. Step 4: Simplify right side
   316,903.50x = 241,518,188,025
5. Step 5: Solve for x
   x = 241,518,188,025/316,903.50
6. Step 6: Final answer
   x = 762,119.03