Finding the Fourth Proportional to 14,139.34, 19,510.81 and 8,172.93

Step by Step Solution

1. Step 1: Write the proportion equation
   14,139.34 : 19,510.81 = 8,172.93 : x
2. Step 2: Convert to fraction form
   14,139.34/19,510.81 = 8,172.93/x
3. Step 3: Cross multiply
   14,139.34x = 19,510.81 × 8,172.93
4. Step 4: Simplify right side
   14,139.34x = 159,460,484.37
5. Step 5: Solve for x
   x = 159,460,484.37/14,139.34
6. Step 6: Final answer
   x = 11,277.79