Finding the Fourth Proportional to 9,381.55, 12,945.75 and 5,347.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,381.55 : 12,945.75 = 5,347.29 : x
2. Step 2: Convert to fraction form
   9,381.55/12,945.75 = 5,347.29/x
3. Step 3: Cross multiply
   9,381.55x = 12,945.75 × 5,347.29
4. Step 4: Simplify right side
   9,381.55x = 69,224,686.64
5. Step 5: Solve for x
   x = 69,224,686.64/9,381.55
6. Step 6: Final answer
   x = 7,378.81