Finding the Fourth Proportional to 2,191.80, 3,024.72 and 1,307.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.80 : 3,024.72 = 1,307.68 : x
2. Step 2: Convert to fraction form
   2,191.80/3,024.72 = 1,307.68/x
3. Step 3: Cross multiply
   2,191.80x = 3,024.72 × 1,307.68
4. Step 4: Simplify right side
   2,191.80x = 3,955,365.85
5. Step 5: Solve for x
   x = 3,955,365.85/2,191.80
6. Step 6: Final answer
   x = 1,804.62