Finding the Fourth Proportional to 1,429.08, 1,970.04 and 1,008.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.08 : 1,970.04 = 1,008.12 : x
2. Step 2: Convert to fraction form
   1,429.08/1,970.04 = 1,008.12/x
3. Step 3: Cross multiply
   1,429.08x = 1,970.04 × 1,008.12
4. Step 4: Simplify right side
   1,429.08x = 1,986,036.72
5. Step 5: Solve for x
   x = 1,986,036.72/1,429.08
6. Step 6: Final answer
   x = 1,389.73