Finding the Fourth Proportional to 10,867.77, 16,296.15 and 5,312.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,867.77 : 16,296.15 = 5,312.79 : x
2. Step 2: Convert to fraction form
   10,867.77/16,296.15 = 5,312.79/x
3. Step 3: Cross multiply
   10,867.77x = 16,296.15 × 5,312.79
4. Step 4: Simplify right side
   10,867.77x = 86,578,022.76
5. Step 5: Solve for x
   x = 86,578,022.76/10,867.77
6. Step 6: Final answer
   x = 7,966.49