Finding the Third Proportional to 143,064 and 212,904

Step by Step Solution

1. Step 1: Write the proportion equation
   143,064 : 212,904 = 212,904 : x
2. Step 2: Convert to fraction form
   143,064/212,904 = 212,904/x
3. Step 3: Cross multiply
   143,064x = 212,904 × 212,904
4. Step 4: Simplify right side
   143,064x = 45,328,113,216
5. Step 5: Solve for x
   x = 45,328,113,216/143,064
6. Step 6: Final answer
   x = 316,838.01