Finding the Fourth Proportional to 13,919.34, 19,208.61 and 7,631.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,919.34 : 19,208.61 = 7,631.58 : x
2. Step 2: Convert to fraction form
   13,919.34/19,208.61 = 7,631.58/x
3. Step 3: Cross multiply
   13,919.34x = 19,208.61 × 7,631.58
4. Step 4: Simplify right side
   13,919.34x = 146,592,043.90
5. Step 5: Solve for x
   x = 146,592,043.90/13,919.34
6. Step 6: Final answer
   x = 10,531.54