Finding the Fourth Proportional to 2,772.70, 4,156.89 and 1,385.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.70 : 4,156.89 = 1,385.34 : x
2. Step 2: Convert to fraction form
   2,772.70/4,156.89 = 1,385.34/x
3. Step 3: Cross multiply
   2,772.70x = 4,156.89 × 1,385.34
4. Step 4: Simplify right side
   2,772.70x = 5,758,685.21
5. Step 5: Solve for x
   x = 5,758,685.21/2,772.70
6. Step 6: Final answer
   x = 2,076.93