Finding the Fourth Proportional to 43,085.44, 64,632.79 and 18,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   43,085.44 : 64,632.79 = 18,128.03 : x
2. Step 2: Convert to fraction form
   43,085.44/64,632.79 = 18,128.03/x
3. Step 3: Cross multiply
   43,085.44x = 64,632.79 × 18,128.03
4. Step 4: Simplify right side
   43,085.44x = 1,171,665,156.10
5. Step 5: Solve for x
   x = 1,171,665,156.10/43,085.44
6. Step 6: Final answer
   x = 27,193.99