Finding the Fourth Proportional to 12,053.52, 18,080.76 and 5,123.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,053.52 : 18,080.76 = 5,123.28 : x
2. Step 2: Convert to fraction form
   12,053.52/18,080.76 = 5,123.28/x
3. Step 3: Cross multiply
   12,053.52x = 18,080.76 × 5,123.28
4. Step 4: Simplify right side
   12,053.52x = 92,632,796.09
5. Step 5: Solve for x
   x = 92,632,796.09/12,053.52
6. Step 6: Final answer
   x = 7,685.12