Finding the Fourth Proportional to 1,642.42, 2,266.98 and 1,111.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.42 : 2,266.98 = 1,111.06 : x
2. Step 2: Convert to fraction form
   1,642.42/2,266.98 = 1,111.06/x
3. Step 3: Cross multiply
   1,642.42x = 2,266.98 × 1,111.06
4. Step 4: Simplify right side
   1,642.42x = 2,518,750.80
5. Step 5: Solve for x
   x = 2,518,750.80/1,642.42
6. Step 6: Final answer
   x = 1,533.56