Finding the Fourth Proportional to 9,190.72, 12,687.60 and 5,656.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,190.72 : 12,687.60 = 5,656.96 : x
2. Step 2: Convert to fraction form
   9,190.72/12,687.60 = 5,656.96/x
3. Step 3: Cross multiply
   9,190.72x = 12,687.60 × 5,656.96
4. Step 4: Simplify right side
   9,190.72x = 71,773,245.70
5. Step 5: Solve for x
   x = 71,773,245.70/9,190.72
6. Step 6: Final answer
   x = 7,809.32