Finding the Fourth Proportional to 6,139.76, 8,472.89 and 3,488.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,139.76 : 8,472.89 = 3,488.05 : x
2. Step 2: Convert to fraction form
   6,139.76/8,472.89 = 3,488.05/x
3. Step 3: Cross multiply
   6,139.76x = 8,472.89 × 3,488.05
4. Step 4: Simplify right side
   6,139.76x = 29,553,804.16
5. Step 5: Solve for x
   x = 29,553,804.16/6,139.76
6. Step 6: Final answer
   x = 4,813.51