Finding the Fourth Proportional to 2,389.78, 3,583.59 and 745.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.78 : 3,583.59 = 745.84 : x
2. Step 2: Convert to fraction form
   2,389.78/3,583.59 = 745.84/x
3. Step 3: Cross multiply
   2,389.78x = 3,583.59 × 745.84
4. Step 4: Simplify right side
   2,389.78x = 2,672,784.77
5. Step 5: Solve for x
   x = 2,672,784.77/2,389.78
6. Step 6: Final answer
   x = 1,118.42