Finding the Third Proportional to 158,410 and 243,158

Step by Step Solution

1. Step 1: Write the proportion equation
   158,410 : 243,158 = 243,158 : x
2. Step 2: Convert to fraction form
   158,410/243,158 = 243,158/x
3. Step 3: Cross multiply
   158,410x = 243,158 × 243,158
4. Step 4: Simplify right side
   158,410x = 59,125,812,964
5. Step 5: Solve for x
   x = 59,125,812,964/158,410
6. Step 6: Final answer
   x = 373,245.46