Finding the Third Proportional to 31,590 and 68,076

Step by Step Solution

1. Step 1: Write the proportion equation
   31,590 : 68,076 = 68,076 : x
2. Step 2: Convert to fraction form
   31,590/68,076 = 68,076/x
3. Step 3: Cross multiply
   31,590x = 68,076 × 68,076
4. Step 4: Simplify right side
   31,590x = 4,634,341,776
5. Step 5: Solve for x
   x = 4,634,341,776/31,590
6. Step 6: Final answer
   x = 146,702.81