Finding the Fourth Proportional to 12,926.81, 17,838.54 and 7,899.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.81 : 17,838.54 = 7,899.46 : x
2. Step 2: Convert to fraction form
   12,926.81/17,838.54 = 7,899.46/x
3. Step 3: Cross multiply
   12,926.81x = 17,838.54 × 7,899.46
4. Step 4: Simplify right side
   12,926.81x = 140,914,788.59
5. Step 5: Solve for x
   x = 140,914,788.59/12,926.81
6. Step 6: Final answer
   x = 10,900.97