Finding the Fourth Proportional to 2,184.16, 3,012.54 and 1,387.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,184.16 : 3,012.54 = 1,387.72 : x
2. Step 2: Convert to fraction form
   2,184.16/3,012.54 = 1,387.72/x
3. Step 3: Cross multiply
   2,184.16x = 3,012.54 × 1,387.72
4. Step 4: Simplify right side
   2,184.16x = 4,180,562.01
5. Step 5: Solve for x
   x = 4,180,562.01/2,184.16
6. Step 6: Final answer
   x = 1,914.04