Finding the Fourth Proportional to 3,870.06, 5,340.71 and 2,101.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.06 : 5,340.71 = 2,101.67 : x
2. Step 2: Convert to fraction form
   3,870.06/5,340.71 = 2,101.67/x
3. Step 3: Cross multiply
   3,870.06x = 5,340.71 × 2,101.67
4. Step 4: Simplify right side
   3,870.06x = 11,224,428.59
5. Step 5: Solve for x
   x = 11,224,428.59/3,870.06
6. Step 6: Final answer
   x = 2,900.32