Finding the Fourth Proportional to 1,490.43, 2,056.82 and 869.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.43 : 2,056.82 = 869.43 : x
2. Step 2: Convert to fraction form
   1,490.43/2,056.82 = 869.43/x
3. Step 3: Cross multiply
   1,490.43x = 2,056.82 × 869.43
4. Step 4: Simplify right side
   1,490.43x = 1,788,256.67
5. Step 5: Solve for x
   x = 1,788,256.67/1,490.43
6. Step 6: Final answer
   x = 1,199.83