Finding the Fourth Proportional to 1,913.61, 2,868.64 and 743.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.61 : 2,868.64 = 743.59 : x
2. Step 2: Convert to fraction form
   1,913.61/2,868.64 = 743.59/x
3. Step 3: Cross multiply
   1,913.61x = 2,868.64 × 743.59
4. Step 4: Simplify right side
   1,913.61x = 2,133,096.55
5. Step 5: Solve for x
   x = 2,133,096.55/1,913.61
6. Step 6: Final answer
   x = 1,114.70