Finding the Fourth Proportional to 2,606.76, 3,910.55 and 874.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.76 : 3,910.55 = 874.98 : x
2. Step 2: Convert to fraction form
   2,606.76/3,910.55 = 874.98/x
3. Step 3: Cross multiply
   2,606.76x = 3,910.55 × 874.98
4. Step 4: Simplify right side
   2,606.76x = 3,421,653.04
5. Step 5: Solve for x
   x = 3,421,653.04/2,606.76
6. Step 6: Final answer
   x = 1,312.61