Finding the Fourth Proportional to 3,870.99, 5,341.88 and 2,102.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.99 : 5,341.88 = 2,102.59 : x
2. Step 2: Convert to fraction form
   3,870.99/5,341.88 = 2,102.59/x
3. Step 3: Cross multiply
   3,870.99x = 5,341.88 × 2,102.59
4. Step 4: Simplify right side
   3,870.99x = 11,231,783.47
5. Step 5: Solve for x
   x = 11,231,783.47/3,870.99
6. Step 6: Final answer
   x = 2,901.53