Finding the Fourth Proportional to 7,128.42, 10,680.94 and 5,038.22

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.42 : 10,680.94 = 5,038.22 : x
2. Step 2: Convert to fraction form
   7,128.42/10,680.94 = 5,038.22/x
3. Step 3: Cross multiply
   7,128.42x = 10,680.94 × 5,038.22
4. Step 4: Simplify right side
   7,128.42x = 53,812,925.53
5. Step 5: Solve for x
   x = 53,812,925.53/7,128.42
6. Step 6: Final answer
   x = 7,549.07