Finding the Fourth Proportional to 1,876.38, 2,588.67 and 1,213.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,876.38 : 2,588.67 = 1,213.62 : x
2. Step 2: Convert to fraction form
   1,876.38/2,588.67 = 1,213.62/x
3. Step 3: Cross multiply
   1,876.38x = 2,588.67 × 1,213.62
4. Step 4: Simplify right side
   1,876.38x = 3,141,661.69
5. Step 5: Solve for x
   x = 3,141,661.69/1,876.38
6. Step 6: Final answer
   x = 1,674.32