Finding the Fourth Proportional to 1,646.12, 2,271.52 and 947.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.12 : 2,271.52 = 947.48 : x
2. Step 2: Convert to fraction form
   1,646.12/2,271.52 = 947.48/x
3. Step 3: Cross multiply
   1,646.12x = 2,271.52 × 947.48
4. Step 4: Simplify right side
   1,646.12x = 2,152,219.77
5. Step 5: Solve for x
   x = 2,152,219.77/1,646.12
6. Step 6: Final answer
   x = 1,307.45