Finding the Third Proportional to 276,886.69 and 427,141.69

Step by Step Solution

1. Step 1: Write the proportion equation
   276,886.69 : 427,141.69 = 427,141.69 : x
2. Step 2: Convert to fraction form
   276,886.69/427,141.69 = 427,141.69/x
3. Step 3: Cross multiply
   276,886.69x = 427,141.69 × 427,141.69
4. Step 4: Simplify right side
   276,886.69x = 182,450,021,200.35
5. Step 5: Solve for x
   x = 182,450,021,200.35/276,886.69
6. Step 6: Final answer
   x = 658,933.89