Finding the Third Proportional to 31,140 and 68,076

Step by Step Solution

1. Step 1: Write the proportion equation
   31,140 : 68,076 = 68,076 : x
2. Step 2: Convert to fraction form
   31,140/68,076 = 68,076/x
3. Step 3: Cross multiply
   31,140x = 68,076 × 68,076
4. Step 4: Simplify right side
   31,140x = 4,634,341,776
5. Step 5: Solve for x
   x = 4,634,341,776/31,140
6. Step 6: Final answer
   x = 148,822.79