Finding the Fourth Proportional to 1,530.19, 2,111.64 and 866.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.19 : 2,111.64 = 866.89 : x
2. Step 2: Convert to fraction form
   1,530.19/2,111.64 = 866.89/x
3. Step 3: Cross multiply
   1,530.19x = 2,111.64 × 866.89
4. Step 4: Simplify right side
   1,530.19x = 1,830,549.04
5. Step 5: Solve for x
   x = 1,830,549.04/1,530.19
6. Step 6: Final answer
   x = 1,196.29