Finding the Fourth Proportional to 12,057.67, 18,061.80 and 7,112.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.67 : 18,061.80 = 7,112.35 : x
2. Step 2: Convert to fraction form
   12,057.67/18,061.80 = 7,112.35/x
3. Step 3: Cross multiply
   12,057.67x = 18,061.80 × 7,112.35
4. Step 4: Simplify right side
   12,057.67x = 128,461,843.23
5. Step 5: Solve for x
   x = 128,461,843.23/12,057.67
6. Step 6: Final answer
   x = 10,653.95