Finding the Third Proportional to 139,560 and 329,124

Step by Step Solution

1. Step 1: Write the proportion equation
   139,560 : 329,124 = 329,124 : x
2. Step 2: Convert to fraction form
   139,560/329,124 = 329,124/x
3. Step 3: Cross multiply
   139,560x = 329,124 × 329,124
4. Step 4: Simplify right side
   139,560x = 108,322,607,376
5. Step 5: Solve for x
   x = 108,322,607,376/139,560
6. Step 6: Final answer
   x = 776,172.31