Finding the Fourth Proportional to 2,911.88, 4,019.82 and 1,985.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.88 : 4,019.82 = 1,985.24 : x
2. Step 2: Convert to fraction form
   2,911.88/4,019.82 = 1,985.24/x
3. Step 3: Cross multiply
   2,911.88x = 4,019.82 × 1,985.24
4. Step 4: Simplify right side
   2,911.88x = 7,980,307.46
5. Step 5: Solve for x
   x = 7,980,307.46/2,911.88
6. Step 6: Final answer
   x = 2,740.60