Finding the Fourth Proportional to 1,642.55, 2,266.35 and 1,111.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.55 : 2,266.35 = 1,111.51 : x
2. Step 2: Convert to fraction form
   1,642.55/2,266.35 = 1,111.51/x
3. Step 3: Cross multiply
   1,642.55x = 2,266.35 × 1,111.51
4. Step 4: Simplify right side
   1,642.55x = 2,519,070.69
5. Step 5: Solve for x
   x = 2,519,070.69/1,642.55
6. Step 6: Final answer
   x = 1,533.63