Finding the Third Proportional to 158,346 and 336,123

Step by Step Solution

1. Step 1: Write the proportion equation
   158,346 : 336,123 = 336,123 : x
2. Step 2: Convert to fraction form
   158,346/336,123 = 336,123/x
3. Step 3: Cross multiply
   158,346x = 336,123 × 336,123
4. Step 4: Simplify right side
   158,346x = 112,978,671,129
5. Step 5: Solve for x
   x = 112,978,671,129/158,346
6. Step 6: Final answer
   x = 713,492.42