Finding the Fourth Proportional to 1,646.10, 2,271.60 and 947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.10 : 2,271.60 = 947.34 : x
2. Step 2: Convert to fraction form
   1,646.10/2,271.60 = 947.34/x
3. Step 3: Cross multiply
   1,646.10x = 2,271.60 × 947.34
4. Step 4: Simplify right side
   1,646.10x = 2,151,977.54
5. Step 5: Solve for x
   x = 2,151,977.54/1,646.10
6. Step 6: Final answer
   x = 1,307.32