Finding the Fourth Proportional to 2,113.31, 2,900.77 and 1,871.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.31 : 2,900.77 = 1,871.99 : x
2. Step 2: Convert to fraction form
   2,113.31/2,900.77 = 1,871.99/x
3. Step 3: Cross multiply
   2,113.31x = 2,900.77 × 1,871.99
4. Step 4: Simplify right side
   2,113.31x = 5,430,212.43
5. Step 5: Solve for x
   x = 5,430,212.43/2,113.31
6. Step 6: Final answer
   x = 2,569.53