Finding the Third Proportional to 173,870 and 380,991

Step by Step Solution

1. Step 1: Write the proportion equation
   173,870 : 380,991 = 380,991 : x
2. Step 2: Convert to fraction form
   173,870/380,991 = 380,991/x
3. Step 3: Cross multiply
   173,870x = 380,991 × 380,991
4. Step 4: Simplify right side
   173,870x = 145,154,142,081
5. Step 5: Solve for x
   x = 145,154,142,081/173,870
6. Step 6: Final answer
   x = 834,842.94