Finding the Fourth Proportional to 12,061.95, 18,096.59 and 8,128.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.95 : 18,096.59 = 8,128.99 : x
2. Step 2: Convert to fraction form
   12,061.95/18,096.59 = 8,128.99/x
3. Step 3: Cross multiply
   12,061.95x = 18,096.59 × 8,128.99
4. Step 4: Simplify right side
   12,061.95x = 147,106,999.14
5. Step 5: Solve for x
   x = 147,106,999.14/12,061.95
6. Step 6: Final answer
   x = 12,195.95