Finding the Fourth Proportional to 1,551.06, 2,139.72 and 1,019.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.06 : 2,139.72 = 1,019.74 : x
2. Step 2: Convert to fraction form
   1,551.06/2,139.72 = 1,019.74/x
3. Step 3: Cross multiply
   1,551.06x = 2,139.72 × 1,019.74
4. Step 4: Simplify right side
   1,551.06x = 2,181,958.07
5. Step 5: Solve for x
   x = 2,181,958.07/1,551.06
6. Step 6: Final answer
   x = 1,406.75