Finding the Fourth Proportional to 2,139.77, 2,953.26 and 1,384.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.77 : 2,953.26 = 1,384.48 : x
2. Step 2: Convert to fraction form
   2,139.77/2,953.26 = 1,384.48/x
3. Step 3: Cross multiply
   2,139.77x = 2,953.26 × 1,384.48
4. Step 4: Simplify right side
   2,139.77x = 4,088,707.72
5. Step 5: Solve for x
   x = 4,088,707.72/2,139.77
6. Step 6: Final answer
   x = 1,910.82