Finding the Third Proportional to 561.94 and 910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   561.94 : 910.78 = 910.78 : x
2. Step 2: Convert to fraction form
   561.94/910.78 = 910.78/x
3. Step 3: Cross multiply
   561.94x = 910.78 × 910.78
4. Step 4: Simplify right side
   561.94x = 829,522.49
5. Step 5: Solve for x
   x = 829,522.49/561.94
6. Step 6: Final answer
   x = 1,476.18