Finding the Fourth Proportional to 9,145.28, 12,620.40 and 5,368.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.28 : 12,620.40 = 5,368.52 : x
2. Step 2: Convert to fraction form
   9,145.28/12,620.40 = 5,368.52/x
3. Step 3: Cross multiply
   9,145.28x = 12,620.40 × 5,368.52
4. Step 4: Simplify right side
   9,145.28x = 67,752,869.81
5. Step 5: Solve for x
   x = 67,752,869.81/9,145.28
6. Step 6: Final answer
   x = 7,408.51