Finding the Fourth Proportional to 1,111.01, 1,666.52 and 289.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.01 : 1,666.52 = 289.28 : x
2. Step 2: Convert to fraction form
   1,111.01/1,666.52 = 289.28/x
3. Step 3: Cross multiply
   1,111.01x = 1,666.52 × 289.28
4. Step 4: Simplify right side
   1,111.01x = 482,094.71
5. Step 5: Solve for x
   x = 482,094.71/1,111.01
6. Step 6: Final answer
   x = 433.93