Finding the Fourth Proportional to 13,907.40, 19,192.06 and 7,619.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,907.40 : 19,192.06 = 7,619.76 : x
2. Step 2: Convert to fraction form
   13,907.40/19,192.06 = 7,619.76/x
3. Step 3: Cross multiply
   13,907.40x = 19,192.06 × 7,619.76
4. Step 4: Simplify right side
   13,907.40x = 146,238,776.10
5. Step 5: Solve for x
   x = 146,238,776.10/13,907.40
6. Step 6: Final answer
   x = 10,515.18