Finding the Fourth Proportional to 2,116.77, 2,921.02 and 1,172.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.77 : 2,921.02 = 1,172.53 : x
2. Step 2: Convert to fraction form
   2,116.77/2,921.02 = 1,172.53/x
3. Step 3: Cross multiply
   2,116.77x = 2,921.02 × 1,172.53
4. Step 4: Simplify right side
   2,116.77x = 3,424,983.58
5. Step 5: Solve for x
   x = 3,424,983.58/2,116.77
6. Step 6: Final answer
   x = 1,618.02