Finding the Fourth Proportional to 2,947.42, 4,417.55 and 1,386.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,947.42 : 4,417.55 = 1,386.15 : x
2. Step 2: Convert to fraction form
   2,947.42/4,417.55 = 1,386.15/x
3. Step 3: Cross multiply
   2,947.42x = 4,417.55 × 1,386.15
4. Step 4: Simplify right side
   2,947.42x = 6,123,386.93
5. Step 5: Solve for x
   x = 6,123,386.93/2,947.42
6. Step 6: Final answer
   x = 2,077.54