Finding the Third Proportional to 31,312 and 67,076

Step by Step Solution

1. Step 1: Write the proportion equation
   31,312 : 67,076 = 67,076 : x
2. Step 2: Convert to fraction form
   31,312/67,076 = 67,076/x
3. Step 3: Cross multiply
   31,312x = 67,076 × 67,076
4. Step 4: Simplify right side
   31,312x = 4,499,189,776
5. Step 5: Solve for x
   x = 4,499,189,776/31,312
6. Step 6: Final answer
   x = 143,688.99