Finding the Fourth Proportional to 2,606.88, 3,910.48 and 875.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.88 : 3,910.48 = 875.76 : x
2. Step 2: Convert to fraction form
   2,606.88/3,910.48 = 875.76/x
3. Step 3: Cross multiply
   2,606.88x = 3,910.48 × 875.76
4. Step 4: Simplify right side
   2,606.88x = 3,424,641.96
5. Step 5: Solve for x
   x = 3,424,641.96/2,606.88
6. Step 6: Final answer
   x = 1,313.69