Finding the Fourth Proportional to 9,558.78, 13,191.27 and 5,366.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,558.78 : 13,191.27 = 5,366.94 : x
2. Step 2: Convert to fraction form
   9,558.78/13,191.27 = 5,366.94/x
3. Step 3: Cross multiply
   9,558.78x = 13,191.27 × 5,366.94
4. Step 4: Simplify right side
   9,558.78x = 70,796,754.61
5. Step 5: Solve for x
   x = 70,796,754.61/9,558.78
6. Step 6: Final answer
   x = 7,406.46