Finding the Fourth Proportional to 1,119.54, 1,680.52 and 947.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.54 : 1,680.52 = 947.01 : x
2. Step 2: Convert to fraction form
   1,119.54/1,680.52 = 947.01/x
3. Step 3: Cross multiply
   1,119.54x = 1,680.52 × 947.01
4. Step 4: Simplify right side
   1,119.54x = 1,591,469.25
5. Step 5: Solve for x
   x = 1,591,469.25/1,119.54
6. Step 6: Final answer
   x = 1,421.54