Finding the Fourth Proportional to 2,129.40, 2,938.82 and 2,061.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.40 : 2,938.82 = 2,061.36 : x
2. Step 2: Convert to fraction form
   2,129.40/2,938.82 = 2,061.36/x
3. Step 3: Cross multiply
   2,129.40x = 2,938.82 × 2,061.36
4. Step 4: Simplify right side
   2,129.40x = 6,057,955.69
5. Step 5: Solve for x
   x = 6,057,955.69/2,129.40
6. Step 6: Final answer
   x = 2,844.91