Finding the Fourth Proportional to 3,869.31, 5,339.67 and 2,100.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.31 : 5,339.67 = 2,100.93 : x
2. Step 2: Convert to fraction form
   3,869.31/5,339.67 = 2,100.93/x
3. Step 3: Cross multiply
   3,869.31x = 5,339.67 × 2,100.93
4. Step 4: Simplify right side
   3,869.31x = 11,218,272.89
5. Step 5: Solve for x
   x = 11,218,272.89/3,869.31
6. Step 6: Final answer
   x = 2,899.30