Finding the Fourth Proportional to 3,777.32, 5,666.79 and 1,145.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,777.32 : 5,666.79 = 1,145.05 : x
2. Step 2: Convert to fraction form
   3,777.32/5,666.79 = 1,145.05/x
3. Step 3: Cross multiply
   3,777.32x = 5,666.79 × 1,145.05
4. Step 4: Simplify right side
   3,777.32x = 6,488,757.89
5. Step 5: Solve for x
   x = 6,488,757.89/3,777.32
6. Step 6: Final answer
   x = 1,717.82