Finding the Fourth Proportional to 1,842.21, 2,761.93 and 1,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,842.21 : 2,761.93 = 1,111.61 : x
2. Step 2: Convert to fraction form
   1,842.21/2,761.93 = 1,111.61/x
3. Step 3: Cross multiply
   1,842.21x = 2,761.93 × 1,111.61
4. Step 4: Simplify right side
   1,842.21x = 3,070,189.01
5. Step 5: Solve for x
   x = 3,070,189.01/1,842.21
6. Step 6: Final answer
   x = 1,666.58