Finding the Fourth Proportional to 2,616.90, 3,611.16 and 1,437.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.90 : 3,611.16 = 1,437.72 : x
2. Step 2: Convert to fraction form
   2,616.90/3,611.16 = 1,437.72/x
3. Step 3: Cross multiply
   2,616.90x = 3,611.16 × 1,437.72
4. Step 4: Simplify right side
   2,616.90x = 5,191,836.96
5. Step 5: Solve for x
   x = 5,191,836.96/2,616.90
6. Step 6: Final answer
   x = 1,983.96