Finding the Fourth Proportional to 2,384.07, 3,290.10 and 1,389.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.07 : 3,290.10 = 1,389.18 : x
2. Step 2: Convert to fraction form
   2,384.07/3,290.10 = 1,389.18/x
3. Step 3: Cross multiply
   2,384.07x = 3,290.10 × 1,389.18
4. Step 4: Simplify right side
   2,384.07x = 4,570,541.12
5. Step 5: Solve for x
   x = 4,570,541.12/2,384.07
6. Step 6: Final answer
   x = 1,917.12