Finding the Fourth Proportional to 1,913.61, 2,640.30 and 1,167.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.61 : 2,640.30 = 1,167.52 : x
2. Step 2: Convert to fraction form
   1,913.61/2,640.30 = 1,167.52/x
3. Step 3: Cross multiply
   1,913.61x = 2,640.30 × 1,167.52
4. Step 4: Simplify right side
   1,913.61x = 3,082,597.22
5. Step 5: Solve for x
   x = 3,082,597.22/1,913.61
6. Step 6: Final answer
   x = 1,610.88