Finding the Fourth Proportional to 3,590.78, 5,384.76 and 1,399.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,590.78 : 5,384.76 = 1,399.22 : x
2. Step 2: Convert to fraction form
   3,590.78/5,384.76 = 1,399.22/x
3. Step 3: Cross multiply
   3,590.78x = 5,384.76 × 1,399.22
4. Step 4: Simplify right side
   3,590.78x = 7,534,463.89
5. Step 5: Solve for x
   x = 7,534,463.89/3,590.78
6. Step 6: Final answer
   x = 2,098.28