Finding the Fourth Proportional to 13,921.94, 19,212.15 and 7,634.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,921.94 : 19,212.15 = 7,634.18 : x
2. Step 2: Convert to fraction form
   13,921.94/19,212.15 = 7,634.18/x
3. Step 3: Cross multiply
   13,921.94x = 19,212.15 × 7,634.18
4. Step 4: Simplify right side
   13,921.94x = 146,669,011.29
5. Step 5: Solve for x
   x = 146,669,011.29/13,921.94
6. Step 6: Final answer
   x = 10,535.10