Finding the Fourth Proportional to 2,172.76, 2,995.59 and 1,385.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.76 : 2,995.59 = 1,385.44 : x
2. Step 2: Convert to fraction form
   2,172.76/2,995.59 = 1,385.44/x
3. Step 3: Cross multiply
   2,172.76x = 2,995.59 × 1,385.44
4. Step 4: Simplify right side
   2,172.76x = 4,150,210.21
5. Step 5: Solve for x
   x = 4,150,210.21/2,172.76
6. Step 6: Final answer
   x = 1,910.11