Finding the Fourth Proportional to 2,333.30, 3,218.72 and 1,388.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,333.30 : 3,218.72 = 1,388.42 : x
2. Step 2: Convert to fraction form
   2,333.30/3,218.72 = 1,388.42/x
3. Step 3: Cross multiply
   2,333.30x = 3,218.72 × 1,388.42
4. Step 4: Simplify right side
   2,333.30x = 4,468,917.39
5. Step 5: Solve for x
   x = 4,468,917.39/2,333.30
6. Step 6: Final answer
   x = 1,915.28