Finding the Fourth Proportional to 1,761.26, 2,642.31 and 1,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.26 : 2,642.31 = 1,111.50 : x
2. Step 2: Convert to fraction form
   1,761.26/2,642.31 = 1,111.50/x
3. Step 3: Cross multiply
   1,761.26x = 2,642.31 × 1,111.50
4. Step 4: Simplify right side
   1,761.26x = 2,936,927.57
5. Step 5: Solve for x
   x = 2,936,927.57/1,761.26
6. Step 6: Final answer
   x = 1,667.52