Finding the Fourth Proportional to 2,576.86, 3,556.05 and 1,397.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.86 : 3,556.05 = 1,397.93 : x
2. Step 2: Convert to fraction form
   2,576.86/3,556.05 = 1,397.93/x
3. Step 3: Cross multiply
   2,576.86x = 3,556.05 × 1,397.93
4. Step 4: Simplify right side
   2,576.86x = 4,971,113.82
5. Step 5: Solve for x
   x = 4,971,113.82/2,576.86
6. Step 6: Final answer
   x = 1,929.13