Finding the Fourth Proportional to 3,407.31, 5,112.18 and 1,947.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,407.31 : 5,112.18 = 1,947.69 : x
2. Step 2: Convert to fraction form
   3,407.31/5,112.18 = 1,947.69/x
3. Step 3: Cross multiply
   3,407.31x = 5,112.18 × 1,947.69
4. Step 4: Simplify right side
   3,407.31x = 9,956,941.86
5. Step 5: Solve for x
   x = 9,956,941.86/3,407.31
6. Step 6: Final answer
   x = 2,922.23