Finding the Fourth Proportional to 2,113.80, 2,918.06 and 1,406.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.80 : 2,918.06 = 1,406.82 : x
2. Step 2: Convert to fraction form
   2,113.80/2,918.06 = 1,406.82/x
3. Step 3: Cross multiply
   2,113.80x = 2,918.06 × 1,406.82
4. Step 4: Simplify right side
   2,113.80x = 4,105,185.17
5. Step 5: Solve for x
   x = 4,105,185.17/2,113.80
6. Step 6: Final answer
   x = 1,942.09