Finding the Fourth Proportional to 9,128.40, 12,602.58 and 5,774.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.40 : 12,602.58 = 5,774.16 : x
2. Step 2: Convert to fraction form
   9,128.40/12,602.58 = 5,774.16/x
3. Step 3: Cross multiply
   9,128.40x = 12,602.58 × 5,774.16
4. Step 4: Simplify right side
   9,128.40x = 72,769,313.33
5. Step 5: Solve for x
   x = 72,769,313.33/9,128.40
6. Step 6: Final answer
   x = 7,971.75