Finding the Fourth Proportional to 12,926.39, 17,837.94 and 7,899.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.39 : 17,837.94 = 7,899.02 : x
2. Step 2: Convert to fraction form
   12,926.39/17,837.94 = 7,899.02/x
3. Step 3: Cross multiply
   12,926.39x = 17,837.94 × 7,899.02
4. Step 4: Simplify right side
   12,926.39x = 140,902,244.82
5. Step 5: Solve for x
   x = 140,902,244.82/12,926.39
6. Step 6: Final answer
   x = 10,900.36