Finding the Fourth Proportional to 1,411.18, 1,947.50 and 851.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.18 : 1,947.50 = 851.64 : x
2. Step 2: Convert to fraction form
   1,411.18/1,947.50 = 851.64/x
3. Step 3: Cross multiply
   1,411.18x = 1,947.50 × 851.64
4. Step 4: Simplify right side
   1,411.18x = 1,658,557.34
5. Step 5: Solve for x
   x = 1,658,557.34/1,411.18
6. Step 6: Final answer
   x = 1,175.30