Finding the Fourth Proportional to 2,772.18, 4,156.83 and 1,127.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.18 : 4,156.83 = 1,127.79 : x
2. Step 2: Convert to fraction form
   2,772.18/4,156.83 = 1,127.79/x
3. Step 3: Cross multiply
   2,772.18x = 4,156.83 × 1,127.79
4. Step 4: Simplify right side
   2,772.18x = 4,688,031.31
5. Step 5: Solve for x
   x = 4,688,031.31/2,772.18
6. Step 6: Final answer
   x = 1,691.10