Finding the Fourth Proportional to 1,529.91, 2,111.02 and 866.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.91 : 2,111.02 = 866.63 : x
2. Step 2: Convert to fraction form
   1,529.91/2,111.02 = 866.63/x
3. Step 3: Cross multiply
   1,529.91x = 2,111.02 × 866.63
4. Step 4: Simplify right side
   1,529.91x = 1,829,460.54
5. Step 5: Solve for x
   x = 1,829,460.54/1,529.91
6. Step 6: Final answer
   x = 1,195.80