Finding the Fourth Proportional to 2,139.88, 2,953.40 and 1,790.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.88 : 2,953.40 = 1,790.44 : x
2. Step 2: Convert to fraction form
   2,139.88/2,953.40 = 1,790.44/x
3. Step 3: Cross multiply
   2,139.88x = 2,953.40 × 1,790.44
4. Step 4: Simplify right side
   2,139.88x = 5,287,885.50
5. Step 5: Solve for x
   x = 5,287,885.50/2,139.88
6. Step 6: Final answer
   x = 2,471.11