Finding the Fourth Proportional to 9,128.66, 12,597.73 and 5,354.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.66 : 12,597.73 = 5,354.71 : x
2. Step 2: Convert to fraction form
   9,128.66/12,597.73 = 5,354.71/x
3. Step 3: Cross multiply
   9,128.66x = 12,597.73 × 5,354.71
4. Step 4: Simplify right side
   9,128.66x = 67,457,145.93
5. Step 5: Solve for x
   x = 67,457,145.93/9,128.66
6. Step 6: Final answer
   x = 7,389.60