Finding the Fourth Proportional to 2,216.39, 3,056.90 and 1,429.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.39 : 3,056.90 = 1,429.07 : x
2. Step 2: Convert to fraction form
   2,216.39/3,056.90 = 1,429.07/x
3. Step 3: Cross multiply
   2,216.39x = 3,056.90 × 1,429.07
4. Step 4: Simplify right side
   2,216.39x = 4,368,520.30
5. Step 5: Solve for x
   x = 4,368,520.30/2,216.39
6. Step 6: Final answer
   x = 1,971.01