Finding the Fourth Proportional to 12,836.68, 17,715.81 and 7,799.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,836.68 : 17,715.81 = 7,799.74 : x
2. Step 2: Convert to fraction form
   12,836.68/17,715.81 = 7,799.74/x
3. Step 3: Cross multiply
   12,836.68x = 17,715.81 × 7,799.74
4. Step 4: Simplify right side
   12,836.68x = 138,178,711.89
5. Step 5: Solve for x
   x = 138,178,711.89/12,836.68
6. Step 6: Final answer
   x = 10,764.37