Finding the Fourth Proportional to 2,384.50, 3,290.52 and 1,389.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.50 : 3,290.52 = 1,389.76 : x
2. Step 2: Convert to fraction form
   2,384.50/3,290.52 = 1,389.76/x
3. Step 3: Cross multiply
   2,384.50x = 3,290.52 × 1,389.76
4. Step 4: Simplify right side
   2,384.50x = 4,573,033.08
5. Step 5: Solve for x
   x = 4,573,033.08/2,384.50
6. Step 6: Final answer
   x = 1,917.82