Finding the Fourth Proportional to 2,139.80, 2,952.06 and 1,641.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.80 : 2,952.06 = 1,641.56 : x
2. Step 2: Convert to fraction form
   2,139.80/2,952.06 = 1,641.56/x
3. Step 3: Cross multiply
   2,139.80x = 2,952.06 × 1,641.56
4. Step 4: Simplify right side
   2,139.80x = 4,845,983.61
5. Step 5: Solve for x
   x = 4,845,983.61/2,139.80
6. Step 6: Final answer
   x = 2,264.69