Finding the Third Proportional to 315,126 and 459,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,126 : 459,148.50 = 459,148.50 : x
2. Step 2: Convert to fraction form
   315,126/459,148.50 = 459,148.50/x
3. Step 3: Cross multiply
   315,126x = 459,148.50 × 459,148.50
4. Step 4: Simplify right side
   315,126x = 210,817,345,052.25
5. Step 5: Solve for x
   x = 210,817,345,052.25/315,126
6. Step 6: Final answer
   x = 668,993.82