Finding the Fourth Proportional to 7,056.59, 9,738.20 and 3,870.17

Step by Step Solution

1. Step 1: Write the proportion equation
   7,056.59 : 9,738.20 = 3,870.17 : x
2. Step 2: Convert to fraction form
   7,056.59/9,738.20 = 3,870.17/x
3. Step 3: Cross multiply
   7,056.59x = 9,738.20 × 3,870.17
4. Step 4: Simplify right side
   7,056.59x = 37,688,489.49
5. Step 5: Solve for x
   x = 37,688,489.49/7,056.59
6. Step 6: Final answer
   x = 5,340.89