Finding the Fourth Proportional to 6,109.34, 8,429.52 and 3,720.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.34 : 8,429.52 = 3,720.57 : x
2. Step 2: Convert to fraction form
   6,109.34/8,429.52 = 3,720.57/x
3. Step 3: Cross multiply
   6,109.34x = 8,429.52 × 3,720.57
4. Step 4: Simplify right side
   6,109.34x = 31,362,619.23
5. Step 5: Solve for x
   x = 31,362,619.23/6,109.34
6. Step 6: Final answer
   x = 5,133.55