Finding the Fourth Proportional to 3,688.42, 5,089.98 and 2,116.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.42 : 5,089.98 = 2,116.76 : x
2. Step 2: Convert to fraction form
   3,688.42/5,089.98 = 2,116.76/x
3. Step 3: Cross multiply
   3,688.42x = 5,089.98 × 2,116.76
4. Step 4: Simplify right side
   3,688.42x = 10,774,266.06
5. Step 5: Solve for x
   x = 10,774,266.06/3,688.42
6. Step 6: Final answer
   x = 2,921.11