Finding the Fourth Proportional to 1,529.17, 2,110.31 and 939.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.17 : 2,110.31 = 939.89 : x
2. Step 2: Convert to fraction form
   1,529.17/2,110.31 = 939.89/x
3. Step 3: Cross multiply
   1,529.17x = 2,110.31 × 939.89
4. Step 4: Simplify right side
   1,529.17x = 1,983,459.27
5. Step 5: Solve for x
   x = 1,983,459.27/1,529.17
6. Step 6: Final answer
   x = 1,297.08