Finding the Third Proportional to 172,080 and 369,078.75

Step by Step Solution

1. Step 1: Write the proportion equation
   172,080 : 369,078.75 = 369,078.75 : x
2. Step 2: Convert to fraction form
   172,080/369,078.75 = 369,078.75/x
3. Step 3: Cross multiply
   172,080x = 369,078.75 × 369,078.75
4. Step 4: Simplify right side
   172,080x = 136,219,123,701.56
5. Step 5: Solve for x
   x = 136,219,123,701.56/172,080
6. Step 6: Final answer
   x = 791,603.46