Finding the Fourth Proportional to 2,558.33, 3,838.10 and 1,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.33 : 3,838.10 = 1,242.72 : x
2. Step 2: Convert to fraction form
   2,558.33/3,838.10 = 1,242.72/x
3. Step 3: Cross multiply
   2,558.33x = 3,838.10 × 1,242.72
4. Step 4: Simplify right side
   2,558.33x = 4,769,677.42
5. Step 5: Solve for x
   x = 4,769,677.42/2,558.33
6. Step 6: Final answer
   x = 1,864.38