Finding the Fourth Proportional to 4,736.32, 7,105.38 and 2,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   4,736.32 : 7,105.38 = 2,139.25 : x
2. Step 2: Convert to fraction form
   4,736.32/7,105.38 = 2,139.25/x
3. Step 3: Cross multiply
   4,736.32x = 7,105.38 × 2,139.25
4. Step 4: Simplify right side
   4,736.32x = 15,200,184.17
5. Step 5: Solve for x
   x = 15,200,184.17/4,736.32
6. Step 6: Final answer
   x = 3,209.28