Finding the Fourth Proportional to 2,380.03, 3,570.65 and 918.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.03 : 3,570.65 = 918.79 : x
2. Step 2: Convert to fraction form
   2,380.03/3,570.65 = 918.79/x
3. Step 3: Cross multiply
   2,380.03x = 3,570.65 × 918.79
4. Step 4: Simplify right side
   2,380.03x = 3,280,677.51
5. Step 5: Solve for x
   x = 3,280,677.51/2,380.03
6. Step 6: Final answer
   x = 1,378.42