Finding the Fourth Proportional to 13,899.41, 19,179.39 and 7,930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,899.41 : 19,179.39 = 7,930.72 : x
2. Step 2: Convert to fraction form
   13,899.41/19,179.39 = 7,930.72/x
3. Step 3: Cross multiply
   13,899.41x = 19,179.39 × 7,930.72
4. Step 4: Simplify right side
   13,899.41x = 152,106,371.86
5. Step 5: Solve for x
   x = 152,106,371.86/13,899.41
6. Step 6: Final answer
   x = 10,943.37