Finding the Fourth Proportional to 13,719.48, 18,931.72 and 8,053.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,719.48 : 18,931.72 = 8,053.62 : x
2. Step 2: Convert to fraction form
   13,719.48/18,931.72 = 8,053.62/x
3. Step 3: Cross multiply
   13,719.48x = 18,931.72 × 8,053.62
4. Step 4: Simplify right side
   13,719.48x = 152,468,878.83
5. Step 5: Solve for x
   x = 152,468,878.83/13,719.48
6. Step 6: Final answer
   x = 11,113.31