Finding the Fourth Proportional to 11,925.40, 16,445.72 and 8,692.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,925.40 : 16,445.72 = 8,692.28 : x
2. Step 2: Convert to fraction form
   11,925.40/16,445.72 = 8,692.28/x
3. Step 3: Cross multiply
   11,925.40x = 16,445.72 × 8,692.28
4. Step 4: Simplify right side
   11,925.40x = 142,950,803.04
5. Step 5: Solve for x
   x = 142,950,803.04/11,925.40
6. Step 6: Final answer
   x = 11,987.09