Finding the Fourth Proportional to 1,624.10, 2,438.55 and 1,259.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,624.10 : 2,438.55 = 1,259.30 : x
2. Step 2: Convert to fraction form
   1,624.10/2,438.55 = 1,259.30/x
3. Step 3: Cross multiply
   1,624.10x = 2,438.55 × 1,259.30
4. Step 4: Simplify right side
   1,624.10x = 3,070,866.02
5. Step 5: Solve for x
   x = 3,070,866.02/1,624.10
6. Step 6: Final answer
   x = 1,890.81