Finding the Fourth Proportional to 2,176.50, 2,999.37 and 1,389.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.50 : 2,999.37 = 1,389.18 : x
2. Step 2: Convert to fraction form
   2,176.50/2,999.37 = 1,389.18/x
3. Step 3: Cross multiply
   2,176.50x = 2,999.37 × 1,389.18
4. Step 4: Simplify right side
   2,176.50x = 4,166,664.82
5. Step 5: Solve for x
   x = 4,166,664.82/2,176.50
6. Step 6: Final answer
   x = 1,914.39