Finding the Fourth Proportional to 1,529.32, 2,109.79 and 931.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.32 : 2,109.79 = 931.59 : x
2. Step 2: Convert to fraction form
   1,529.32/2,109.79 = 931.59/x
3. Step 3: Cross multiply
   1,529.32x = 2,109.79 × 931.59
4. Step 4: Simplify right side
   1,529.32x = 1,965,460.69
5. Step 5: Solve for x
   x = 1,965,460.69/1,529.32
6. Step 6: Final answer
   x = 1,285.19