Finding the Fourth Proportional to 1,947.42, 2,686.86 and 1,161.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.42 : 2,686.86 = 1,161.36 : x
2. Step 2: Convert to fraction form
   1,947.42/2,686.86 = 1,161.36/x
3. Step 3: Cross multiply
   1,947.42x = 2,686.86 × 1,161.36
4. Step 4: Simplify right side
   1,947.42x = 3,120,411.73
5. Step 5: Solve for x
   x = 3,120,411.73/1,947.42
6. Step 6: Final answer
   x = 1,602.33