Finding the Fourth Proportional to 8,559.42, 12,770.00 and 7,312.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.42 : 12,770.00 = 7,312.38 : x
2. Step 2: Convert to fraction form
   8,559.42/12,770.00 = 7,312.38/x
3. Step 3: Cross multiply
   8,559.42x = 12,770.00 × 7,312.38
4. Step 4: Simplify right side
   8,559.42x = 93,379,056.04
5. Step 5: Solve for x
   x = 93,379,056.04/8,559.42
6. Step 6: Final answer
   x = 10,909.51