Finding the Fourth Proportional to 1,435.96, 1,978.94 and 1,120.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.96 : 1,978.94 = 1,120.74 : x
2. Step 2: Convert to fraction form
   1,435.96/1,978.94 = 1,120.74/x
3. Step 3: Cross multiply
   1,435.96x = 1,978.94 × 1,120.74
4. Step 4: Simplify right side
   1,435.96x = 2,217,877.22
5. Step 5: Solve for x
   x = 2,217,877.22/1,435.96
6. Step 6: Final answer
   x = 1,544.53