Finding the Third Proportional to 311,158.50 and 480,558

Step by Step Solution

1. Step 1: Write the proportion equation
   311,158.50 : 480,558 = 480,558 : x
2. Step 2: Convert to fraction form
   311,158.50/480,558 = 480,558/x
3. Step 3: Cross multiply
   311,158.50x = 480,558 × 480,558
4. Step 4: Simplify right side
   311,158.50x = 230,935,991,364
5. Step 5: Solve for x
   x = 230,935,991,364/311,158.50
6. Step 6: Final answer
   x = 742,181.21