Finding the Third Proportional to 291,060.28 and 636,228.56

Step by Step Solution

1. Step 1: Write the proportion equation
   291,060.28 : 636,228.56 = 636,228.56 : x
2. Step 2: Convert to fraction form
   291,060.28/636,228.56 = 636,228.56/x
3. Step 3: Cross multiply
   291,060.28x = 636,228.56 × 636,228.56
4. Step 4: Simplify right side
   291,060.28x = 404,786,783,740.82
5. Step 5: Solve for x
   x = 404,786,783,740.82/291,060.28
6. Step 6: Final answer
   x = 1,390,731.78