Finding the Fourth Proportional to 2,573.61, 3,859.80 and 1,111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.61 : 3,859.80 = 1,111.96 : x
2. Step 2: Convert to fraction form
   2,573.61/3,859.80 = 1,111.96/x
3. Step 3: Cross multiply
   2,573.61x = 3,859.80 × 1,111.96
4. Step 4: Simplify right side
   2,573.61x = 4,291,950.12
5. Step 5: Solve for x
   x = 4,291,950.12/2,573.61
6. Step 6: Final answer
   x = 1,667.68