Finding the Third Proportional to 139,562 and 329,129

Step by Step Solution

1. Step 1: Write the proportion equation
   139,562 : 329,129 = 329,129 : x
2. Step 2: Convert to fraction form
   139,562/329,129 = 329,129/x
3. Step 3: Cross multiply
   139,562x = 329,129 × 329,129
4. Step 4: Simplify right side
   139,562x = 108,325,898,641
5. Step 5: Solve for x
   x = 108,325,898,641/139,562
6. Step 6: Final answer
   x = 776,184.77