Finding the Fourth Proportional to 3,818.09, 5,268.98 and 2,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818.09 : 5,268.98 = 2,139.50 : x
2. Step 2: Convert to fraction form
   3,818.09/5,268.98 = 2,139.50/x
3. Step 3: Cross multiply
   3,818.09x = 5,268.98 × 2,139.50
4. Step 4: Simplify right side
   3,818.09x = 11,272,971.59
5. Step 5: Solve for x
   x = 11,272,971.59/3,818.09
6. Step 6: Final answer
   x = 2,952.52