Finding the Fourth Proportional to 1,434.05, 1,978.96 and 804.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.05 : 1,978.96 = 804.57 : x
2. Step 2: Convert to fraction form
   1,434.05/1,978.96 = 804.57/x
3. Step 3: Cross multiply
   1,434.05x = 1,978.96 × 804.57
4. Step 4: Simplify right side
   1,434.05x = 1,592,201.95
5. Step 5: Solve for x
   x = 1,592,201.95/1,434.05
6. Step 6: Final answer
   x = 1,110.28