Finding the Fourth Proportional to 2,109.93, 3,164.07 and 876.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.93 : 3,164.07 = 876.70 : x
2. Step 2: Convert to fraction form
   2,109.93/3,164.07 = 876.70/x
3. Step 3: Cross multiply
   2,109.93x = 3,164.07 × 876.70
4. Step 4: Simplify right side
   2,109.93x = 2,773,940.17
5. Step 5: Solve for x
   x = 2,773,940.17/2,109.93
6. Step 6: Final answer
   x = 1,314.71