Finding the Fourth Proportional to 13,826.60, 19,080.70 and 7,538.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.60 : 19,080.70 = 7,538.98 : x
2. Step 2: Convert to fraction form
   13,826.60/19,080.70 = 7,538.98/x
3. Step 3: Cross multiply
   13,826.60x = 19,080.70 × 7,538.98
4. Step 4: Simplify right side
   13,826.60x = 143,849,015.69
5. Step 5: Solve for x
   x = 143,849,015.69/13,826.60
6. Step 6: Final answer
   x = 10,403.79