Finding the Fourth Proportional to 1,420.17, 1,959.69 and 1,047.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.17 : 1,959.69 = 1,047.35 : x
2. Step 2: Convert to fraction form
   1,420.17/1,959.69 = 1,047.35/x
3. Step 3: Cross multiply
   1,420.17x = 1,959.69 × 1,047.35
4. Step 4: Simplify right side
   1,420.17x = 2,052,471.52
5. Step 5: Solve for x
   x = 2,052,471.52/1,420.17
6. Step 6: Final answer
   x = 1,445.23