Finding the Fourth Proportional to 1,429.48, 1,973.87 and 1,009.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.48 : 1,973.87 = 1,009.90 : x
2. Step 2: Convert to fraction form
   1,429.48/1,973.87 = 1,009.90/x
3. Step 3: Cross multiply
   1,429.48x = 1,973.87 × 1,009.90
4. Step 4: Simplify right side
   1,429.48x = 1,993,411.31
5. Step 5: Solve for x
   x = 1,993,411.31/1,429.48
6. Step 6: Final answer
   x = 1,394.50