Finding the Fourth Proportional to 2,219.79, 3,064.86 and 1,380.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.79 : 3,064.86 = 1,380.84 : x
2. Step 2: Convert to fraction form
   2,219.79/3,064.86 = 1,380.84/x
3. Step 3: Cross multiply
   2,219.79x = 3,064.86 × 1,380.84
4. Step 4: Simplify right side
   2,219.79x = 4,232,081.28
5. Step 5: Solve for x
   x = 4,232,081.28/2,219.79
6. Step 6: Final answer
   x = 1,906.52