Finding the Fourth Proportional to 19,131.57, 28,692.16 and 12,101.02

Step by Step Solution

1. Step 1: Write the proportion equation
   19,131.57 : 28,692.16 = 12,101.02 : x
2. Step 2: Convert to fraction form
   19,131.57/28,692.16 = 12,101.02/x
3. Step 3: Cross multiply
   19,131.57x = 28,692.16 × 12,101.02
4. Step 4: Simplify right side
   19,131.57x = 347,204,300.02
5. Step 5: Solve for x
   x = 347,204,300.02/19,131.57
6. Step 6: Final answer
   x = 18,148.24