Finding the Fourth Proportional to 12,926.38, 17,837.91 and 7,899.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.38 : 17,837.91 = 7,899.01 : x
2. Step 2: Convert to fraction form
   12,926.38/17,837.91 = 7,899.01/x
3. Step 3: Cross multiply
   12,926.38x = 17,837.91 × 7,899.01
4. Step 4: Simplify right side
   12,926.38x = 140,901,829.47
5. Step 5: Solve for x
   x = 140,901,829.47/12,926.38
6. Step 6: Final answer
   x = 10,900.33