Finding the Fourth Proportional to 2,182.47, 3,011.81 and 1,187.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.47 : 3,011.81 = 1,187.76 : x
2. Step 2: Convert to fraction form
   2,182.47/3,011.81 = 1,187.76/x
3. Step 3: Cross multiply
   2,182.47x = 3,011.81 × 1,187.76
4. Step 4: Simplify right side
   2,182.47x = 3,577,307.45
5. Step 5: Solve for x
   x = 3,577,307.45/2,182.47
6. Step 6: Final answer
   x = 1,639.11