Finding the Third Proportional to 521.81 and 1,072.88

Step by Step Solution

1. Step 1: Write the proportion equation
   521.81 : 1,072.88 = 1,072.88 : x
2. Step 2: Convert to fraction form
   521.81/1,072.88 = 1,072.88/x
3. Step 3: Cross multiply
   521.81x = 1,072.88 × 1,072.88
4. Step 4: Simplify right side
   521.81x = 1,151,060.77
5. Step 5: Solve for x
   x = 1,151,060.77/521.81
6. Step 6: Final answer
   x = 2,205.89