Finding the Fourth Proportional to 2,171.54, 2,997.06 and 1,387.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.54 : 2,997.06 = 1,387.46 : x
2. Step 2: Convert to fraction form
   2,171.54/2,997.06 = 1,387.46/x
3. Step 3: Cross multiply
   2,171.54x = 2,997.06 × 1,387.46
4. Step 4: Simplify right side
   2,171.54x = 4,158,300.87
5. Step 5: Solve for x
   x = 4,158,300.87/2,171.54
6. Step 6: Final answer
   x = 1,914.91