Finding the Fourth Proportional to 8,311.07, 12,437.34 and 5,192.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.07 : 12,437.34 = 5,192.55 : x
2. Step 2: Convert to fraction form
   8,311.07/12,437.34 = 5,192.55/x
3. Step 3: Cross multiply
   8,311.07x = 12,437.34 × 5,192.55
4. Step 4: Simplify right side
   8,311.07x = 64,581,509.82
5. Step 5: Solve for x
   x = 64,581,509.82/8,311.07
6. Step 6: Final answer
   x = 7,770.54