Finding the Fourth Proportional to 2,129.84, 2,938.89 and 1,185.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.84 : 2,938.89 = 1,185.56 : x
2. Step 2: Convert to fraction form
   2,129.84/2,938.89 = 1,185.56/x
3. Step 3: Cross multiply
   2,129.84x = 2,938.89 × 1,185.56
4. Step 4: Simplify right side
   2,129.84x = 3,484,230.43
5. Step 5: Solve for x
   x = 3,484,230.43/2,129.84
6. Step 6: Final answer
   x = 1,635.91