Finding the Third Proportional to 143,422 and 315,152

Step by Step Solution

1. Step 1: Write the proportion equation
   143,422 : 315,152 = 315,152 : x
2. Step 2: Convert to fraction form
   143,422/315,152 = 315,152/x
3. Step 3: Cross multiply
   143,422x = 315,152 × 315,152
4. Step 4: Simplify right side
   143,422x = 99,320,783,104
5. Step 5: Solve for x
   x = 99,320,783,104/143,422
6. Step 6: Final answer
   x = 692,507.31