Finding the Fourth Proportional to 2,384.90, 3,291.25 and 1,390.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.90 : 3,291.25 = 1,390.01 : x
2. Step 2: Convert to fraction form
   2,384.90/3,291.25 = 1,390.01/x
3. Step 3: Cross multiply
   2,384.90x = 3,291.25 × 1,390.01
4. Step 4: Simplify right side
   2,384.90x = 4,574,870.41
5. Step 5: Solve for x
   x = 4,574,870.41/2,384.90
6. Step 6: Final answer
   x = 1,918.27