Finding the Fourth Proportional to 1,646.12, 2,271.89 and 947.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.12 : 2,271.89 = 947.36 : x
2. Step 2: Convert to fraction form
   1,646.12/2,271.89 = 947.36/x
3. Step 3: Cross multiply
   1,646.12x = 2,271.89 × 947.36
4. Step 4: Simplify right side
   1,646.12x = 2,152,297.71
5. Step 5: Solve for x
   x = 2,152,297.71/1,646.12
6. Step 6: Final answer
   x = 1,307.50