Finding the Fourth Proportional to 2,298.55, 3,447.89 and 838.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.55 : 3,447.89 = 838.79 : x
2. Step 2: Convert to fraction form
   2,298.55/3,447.89 = 838.79/x
3. Step 3: Cross multiply
   2,298.55x = 3,447.89 × 838.79
4. Step 4: Simplify right side
   2,298.55x = 2,892,051.46
5. Step 5: Solve for x
   x = 2,892,051.46/2,298.55
6. Step 6: Final answer
   x = 1,258.21