Finding the Fourth Proportional to 13,826.62, 19,080.73 and 7,858.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.62 : 19,080.73 = 7,858.30 : x
2. Step 2: Convert to fraction form
   13,826.62/19,080.73 = 7,858.30/x
3. Step 3: Cross multiply
   13,826.62x = 19,080.73 × 7,858.30
4. Step 4: Simplify right side
   13,826.62x = 149,942,100.56
5. Step 5: Solve for x
   x = 149,942,100.56/13,826.62
6. Step 6: Final answer
   x = 10,844.45