Finding the Fourth Proportional to 13,866.93, 19,139.69 and 7,900.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,866.93 : 19,139.69 = 7,900.07 : x
2. Step 2: Convert to fraction form
   13,866.93/19,139.69 = 7,900.07/x
3. Step 3: Cross multiply
   13,866.93x = 19,139.69 × 7,900.07
4. Step 4: Simplify right side
   13,866.93x = 151,204,814.83
5. Step 5: Solve for x
   x = 151,204,814.83/13,866.93
6. Step 6: Final answer
   x = 10,903.99