Finding the Fourth Proportional to 1,913.59, 2,640.72 and 1,127.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.59 : 2,640.72 = 1,127.62 : x
2. Step 2: Convert to fraction form
   1,913.59/2,640.72 = 1,127.62/x
3. Step 3: Cross multiply
   1,913.59x = 2,640.72 × 1,127.62
4. Step 4: Simplify right side
   1,913.59x = 2,977,728.69
5. Step 5: Solve for x
   x = 2,977,728.69/1,913.59
6. Step 6: Final answer
   x = 1,556.10