Finding the Fourth Proportional to 1,434.13, 1,978.62 and 804.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.13 : 1,978.62 = 804.55 : x
2. Step 2: Convert to fraction form
   1,434.13/1,978.62 = 804.55/x
3. Step 3: Cross multiply
   1,434.13x = 1,978.62 × 804.55
4. Step 4: Simplify right side
   1,434.13x = 1,591,898.72
5. Step 5: Solve for x
   x = 1,591,898.72/1,434.13
6. Step 6: Final answer
   x = 1,110.01