Finding the Fourth Proportional to 2,100.72, 2,887.08 and 2,042.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.72 : 2,887.08 = 2,042.40 : x
2. Step 2: Convert to fraction form
   2,100.72/2,887.08 = 2,042.40/x
3. Step 3: Cross multiply
   2,100.72x = 2,887.08 × 2,042.40
4. Step 4: Simplify right side
   2,100.72x = 5,896,572.19
5. Step 5: Solve for x
   x = 5,896,572.19/2,100.72
6. Step 6: Final answer
   x = 2,806.93