Finding the Fourth Proportional to 1,627.20, 2,437.20 and 1,259.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.20 : 2,437.20 = 1,259.10 : x
2. Step 2: Convert to fraction form
   1,627.20/2,437.20 = 1,259.10/x
3. Step 3: Cross multiply
   1,627.20x = 2,437.20 × 1,259.10
4. Step 4: Simplify right side
   1,627.20x = 3,068,678.52
5. Step 5: Solve for x
   x = 3,068,678.52/1,627.20
6. Step 6: Final answer
   x = 1,885.86