Finding the Fourth Proportional to 2,338.76, 3,509.12 and 877.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.76 : 3,509.12 = 877.72 : x
2. Step 2: Convert to fraction form
   2,338.76/3,509.12 = 877.72/x
3. Step 3: Cross multiply
   2,338.76x = 3,509.12 × 877.72
4. Step 4: Simplify right side
   2,338.76x = 3,080,024.81
5. Step 5: Solve for x
   x = 3,080,024.81/2,338.76
6. Step 6: Final answer
   x = 1,316.95