Finding the Fourth Proportional to 1,429.41, 1,972.00 and 869.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.41 : 1,972.00 = 869.43 : x
2. Step 2: Convert to fraction form
   1,429.41/1,972.00 = 869.43/x
3. Step 3: Cross multiply
   1,429.41x = 1,972.00 × 869.43
4. Step 4: Simplify right side
   1,429.41x = 1,714,515.79
5. Step 5: Solve for x
   x = 1,714,515.79/1,429.41
6. Step 6: Final answer
   x = 1,199.46