Finding the Fourth Proportional to 3,507, 4,839.72 and 2,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,507 : 4,839.72 = 2,109.72 : x
2. Step 2: Convert to fraction form
   3,507/4,839.72 = 2,109.72/x
3. Step 3: Cross multiply
   3,507x = 4,839.72 × 2,109.72
4. Step 4: Simplify right side
   3,507x = 10,210,454.08
5. Step 5: Solve for x
   x = 10,210,454.08/3,507
6. Step 6: Final answer
   x = 2,911.45