Finding the Fourth Proportional to 13,902.76, 19,185.83 and 7,615

Step by Step Solution

1. Step 1: Write the proportion equation
   13,902.76 : 19,185.83 = 7,615 : x
2. Step 2: Convert to fraction form
   13,902.76/19,185.83 = 7,615/x
3. Step 3: Cross multiply
   13,902.76x = 19,185.83 × 7,615
4. Step 4: Simplify right side
   13,902.76x = 146,100,095.45
5. Step 5: Solve for x
   x = 146,100,095.45/13,902.76
6. Step 6: Final answer
   x = 10,508.71