Finding the Fourth Proportional to 1,433.56, 1,978.20 and 835.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.56 : 1,978.20 = 835.96 : x
2. Step 2: Convert to fraction form
   1,433.56/1,978.20 = 835.96/x
3. Step 3: Cross multiply
   1,433.56x = 1,978.20 × 835.96
4. Step 4: Simplify right side
   1,433.56x = 1,653,696.07
5. Step 5: Solve for x
   x = 1,653,696.07/1,433.56
6. Step 6: Final answer
   x = 1,153.56