Finding the Fourth Proportional to 8,839.60, 12,192.30 and 5,692.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,839.60 : 12,192.30 = 5,692.78 : x
2. Step 2: Convert to fraction form
   8,839.60/12,192.30 = 5,692.78/x
3. Step 3: Cross multiply
   8,839.60x = 12,192.30 × 5,692.78
4. Step 4: Simplify right side
   8,839.60x = 69,408,081.59
5. Step 5: Solve for x
   x = 69,408,081.59/8,839.60
6. Step 6: Final answer
   x = 7,851.95