Finding the Third Proportional to 3,557.25 and 7,781.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.25 : 7,781.91 = 7,781.91 : x
2. Step 2: Convert to fraction form
   3,557.25/7,781.91 = 7,781.91/x
3. Step 3: Cross multiply
   3,557.25x = 7,781.91 × 7,781.91
4. Step 4: Simplify right side
   3,557.25x = 60,558,064.88
5. Step 5: Solve for x
   x = 60,558,064.88/3,557.25
6. Step 6: Final answer
   x = 17,023.84