Finding the Third Proportional to 879.56 and 1,372.59

Step by Step Solution

1. Step 1: Write the proportion equation
   879.56 : 1,372.59 = 1,372.59 : x
2. Step 2: Convert to fraction form
   879.56/1,372.59 = 1,372.59/x
3. Step 3: Cross multiply
   879.56x = 1,372.59 × 1,372.59
4. Step 4: Simplify right side
   879.56x = 1,884,013.60
5. Step 5: Solve for x
   x = 1,884,013.60/879.56
6. Step 6: Final answer
   x = 2,141.99