Finding the Fourth Proportional to 19,168.02, 28,753.38 and 5,128.02

Step by Step Solution

1. Step 1: Write the proportion equation
   19,168.02 : 28,753.38 = 5,128.02 : x
2. Step 2: Convert to fraction form
   19,168.02/28,753.38 = 5,128.02/x
3. Step 3: Cross multiply
   19,168.02x = 28,753.38 × 5,128.02
4. Step 4: Simplify right side
   19,168.02x = 147,447,907.71
5. Step 5: Solve for x
   x = 147,447,907.71/19,168.02
6. Step 6: Final answer
   x = 7,692.39