Finding the Fourth Proportional to 10,110.20, 15,171.57 and 3,870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,110.20 : 15,171.57 = 3,870.72 : x
2. Step 2: Convert to fraction form
   10,110.20/15,171.57 = 3,870.72/x
3. Step 3: Cross multiply
   10,110.20x = 15,171.57 × 3,870.72
4. Step 4: Simplify right side
   10,110.20x = 58,724,899.43
5. Step 5: Solve for x
   x = 58,724,899.43/10,110.20
6. Step 6: Final answer
   x = 5,808.48