Finding the Fourth Proportional to 1,429.98, 1,983.17 and 1,380.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.98 : 1,983.17 = 1,380.66 : x
2. Step 2: Convert to fraction form
   1,429.98/1,983.17 = 1,380.66/x
3. Step 3: Cross multiply
   1,429.98x = 1,983.17 × 1,380.66
4. Step 4: Simplify right side
   1,429.98x = 2,738,076.59
5. Step 5: Solve for x
   x = 2,738,076.59/1,429.98
6. Step 6: Final answer
   x = 1,914.77