Finding the Fourth Proportional to 3,870.01, 5,340.64 and 2,101.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.01 : 5,340.64 = 2,101.62 : x
2. Step 2: Convert to fraction form
   3,870.01/5,340.64 = 2,101.62/x
3. Step 3: Cross multiply
   3,870.01x = 5,340.64 × 2,101.62
4. Step 4: Simplify right side
   3,870.01x = 11,223,970.56
5. Step 5: Solve for x
   x = 11,223,970.56/3,870.01
6. Step 6: Final answer
   x = 2,900.24