Finding the Fourth Proportional to 3,736.98, 5,128.61 and 3,438.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,736.98 : 5,128.61 = 3,438.90 : x
2. Step 2: Convert to fraction form
   3,736.98/5,128.61 = 3,438.90/x
3. Step 3: Cross multiply
   3,736.98x = 5,128.61 × 3,438.90
4. Step 4: Simplify right side
   3,736.98x = 17,636,759.73
5. Step 5: Solve for x
   x = 17,636,759.73/3,736.98
6. Step 6: Final answer
   x = 4,719.52