Finding the Fourth Proportional to 1,915.83, 2,643.77 and 1,171.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.83 : 2,643.77 = 1,171.03 : x
2. Step 2: Convert to fraction form
   1,915.83/2,643.77 = 1,171.03/x
3. Step 3: Cross multiply
   1,915.83x = 2,643.77 × 1,171.03
4. Step 4: Simplify right side
   1,915.83x = 3,095,933.98
5. Step 5: Solve for x
   x = 3,095,933.98/1,915.83
6. Step 6: Final answer
   x = 1,615.98