Finding the Fourth Proportional to 4,430.18, 6,111.90 and 3,870.67

Step by Step Solution

1. Step 1: Write the proportion equation
   4,430.18 : 6,111.90 = 3,870.67 : x
2. Step 2: Convert to fraction form
   4,430.18/6,111.90 = 3,870.67/x
3. Step 3: Cross multiply
   4,430.18x = 6,111.90 × 3,870.67
4. Step 4: Simplify right side
   4,430.18x = 23,657,132.69
5. Step 5: Solve for x
   x = 23,657,132.69/4,430.18
6. Step 6: Final answer
   x = 5,340.00