Finding the Third Proportional to 1,780.88 and 3,904.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.88 : 3,904.31 = 3,904.31 : x
2. Step 2: Convert to fraction form
   1,780.88/3,904.31 = 3,904.31/x
3. Step 3: Cross multiply
   1,780.88x = 3,904.31 × 3,904.31
4. Step 4: Simplify right side
   1,780.88x = 15,243,656.10
5. Step 5: Solve for x
   x = 15,243,656.10/1,780.88
6. Step 6: Final answer
   x = 8,559.64