Finding the Fourth Proportional to 3,932.34, 5,426.59 and 2,139.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932.34 : 5,426.59 = 2,139.87 : x
2. Step 2: Convert to fraction form
   3,932.34/5,426.59 = 2,139.87/x
3. Step 3: Cross multiply
   3,932.34x = 5,426.59 × 2,139.87
4. Step 4: Simplify right side
   3,932.34x = 11,612,212.14
5. Step 5: Solve for x
   x = 11,612,212.14/3,932.34
6. Step 6: Final answer
   x = 2,953.00