Finding the Fourth Proportional to 2,478.69, 3,713.93 and 1,089.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.69 : 3,713.93 = 1,089.94 : x
2. Step 2: Convert to fraction form
   2,478.69/3,713.93 = 1,089.94/x
3. Step 3: Cross multiply
   2,478.69x = 3,713.93 × 1,089.94
4. Step 4: Simplify right side
   2,478.69x = 4,047,960.86
5. Step 5: Solve for x
   x = 4,047,960.86/2,478.69
6. Step 6: Final answer
   x = 1,633.10