Finding the Fourth Proportional to 1,429.98, 2,140.93 and 908.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.98 : 2,140.93 = 908.69 : x
2. Step 2: Convert to fraction form
   1,429.98/2,140.93 = 908.69/x
3. Step 3: Cross multiply
   1,429.98x = 2,140.93 × 908.69
4. Step 4: Simplify right side
   1,429.98x = 1,945,448.17
5. Step 5: Solve for x
   x = 1,945,448.17/1,429.98
6. Step 6: Final answer
   x = 1,360.47