Finding the Fourth Proportional to 1,429.81, 2,148.31 and 910.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.81 : 2,148.31 = 910.05 : x
2. Step 2: Convert to fraction form
   1,429.81/2,148.31 = 910.05/x
3. Step 3: Cross multiply
   1,429.81x = 2,148.31 × 910.05
4. Step 4: Simplify right side
   1,429.81x = 1,955,069.52
5. Step 5: Solve for x
   x = 1,955,069.52/1,429.81
6. Step 6: Final answer
   x = 1,367.36