Finding the Fourth Proportional to 1,530.05, 2,111.42 and 866.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.05 : 2,111.42 = 866.88 : x
2. Step 2: Convert to fraction form
   1,530.05/2,111.42 = 866.88/x
3. Step 3: Cross multiply
   1,530.05x = 2,111.42 × 866.88
4. Step 4: Simplify right side
   1,530.05x = 1,830,349.94
5. Step 5: Solve for x
   x = 1,830,349.94/1,530.05
6. Step 6: Final answer
   x = 1,196.27