Finding the Fourth Proportional to 13,989.27, 19,322.53 and 10,154.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,989.27 : 19,322.53 = 10,154.78 : x
2. Step 2: Convert to fraction form
   13,989.27/19,322.53 = 10,154.78/x
3. Step 3: Cross multiply
   13,989.27x = 19,322.53 × 10,154.78
4. Step 4: Simplify right side
   13,989.27x = 196,216,100.34
5. Step 5: Solve for x
   x = 196,216,100.34/13,989.27
6. Step 6: Final answer
   x = 14,026.18