Finding the Fourth Proportional to 5,111.87, 7,630.49 and 4,386.11

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.87 : 7,630.49 = 4,386.11 : x
2. Step 2: Convert to fraction form
   5,111.87/7,630.49 = 4,386.11/x
3. Step 3: Cross multiply
   5,111.87x = 7,630.49 × 4,386.11
4. Step 4: Simplify right side
   5,111.87x = 33,468,141.31
5. Step 5: Solve for x
   x = 33,468,141.31/5,111.87
6. Step 6: Final answer
   x = 6,547.15