Finding the Fourth Proportional to 2,139.16, 2,953.49 and 1,384.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.16 : 2,953.49 = 1,384.76 : x
2. Step 2: Convert to fraction form
   2,139.16/2,953.49 = 1,384.76/x
3. Step 3: Cross multiply
   2,139.16x = 2,953.49 × 1,384.76
4. Step 4: Simplify right side
   2,139.16x = 4,089,853.12
5. Step 5: Solve for x
   x = 4,089,853.12/2,139.16
6. Step 6: Final answer
   x = 1,911.90