Finding the Fourth Proportional to 1,530.01, 2,111.55 and 866.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.01 : 2,111.55 = 866.91 : x
2. Step 2: Convert to fraction form
   1,530.01/2,111.55 = 866.91/x
3. Step 3: Cross multiply
   1,530.01x = 2,111.55 × 866.91
4. Step 4: Simplify right side
   1,530.01x = 1,830,513.25
5. Step 5: Solve for x
   x = 1,830,513.25/1,530.01
6. Step 6: Final answer
   x = 1,196.41