Finding the Fourth Proportional to 1,934.51, 2,899.89 and 1,239.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,934.51 : 2,899.89 = 1,239.21 : x
2. Step 2: Convert to fraction form
   1,934.51/2,899.89 = 1,239.21/x
3. Step 3: Cross multiply
   1,934.51x = 2,899.89 × 1,239.21
4. Step 4: Simplify right side
   1,934.51x = 3,593,572.69
5. Step 5: Solve for x
   x = 3,593,572.69/1,934.51
6. Step 6: Final answer
   x = 1,857.62