Finding the Third Proportional to 111,554.72 and 169,947.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111,554.72 : 169,947.28 = 169,947.28 : x
2. Step 2: Convert to fraction form
   111,554.72/169,947.28 = 169,947.28/x
3. Step 3: Cross multiply
   111,554.72x = 169,947.28 × 169,947.28
4. Step 4: Simplify right side
   111,554.72x = 28,882,078,404.27
5. Step 5: Solve for x
   x = 28,882,078,404.27/111,554.72
6. Step 6: Final answer
   x = 258,905.04