Finding the Fourth Proportional to 5,111.91, 7,628.94 and 4,980.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.91 : 7,628.94 = 4,980.69 : x
2. Step 2: Convert to fraction form
   5,111.91/7,628.94 = 4,980.69/x
3. Step 3: Cross multiply
   5,111.91x = 7,628.94 × 4,980.69
4. Step 4: Simplify right side
   5,111.91x = 37,997,385.17
5. Step 5: Solve for x
   x = 37,997,385.17/5,111.91
6. Step 6: Final answer
   x = 7,433.11