Finding the Fourth Proportional to 2,233.10, 3,347.12 and 771.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.10 : 3,347.12 = 771.05 : x
2. Step 2: Convert to fraction form
   2,233.10/3,347.12 = 771.05/x
3. Step 3: Cross multiply
   2,233.10x = 3,347.12 × 771.05
4. Step 4: Simplify right side
   2,233.10x = 2,580,807.17
5. Step 5: Solve for x
   x = 2,580,807.17/2,233.10
6. Step 6: Final answer
   x = 1,155.70