Finding the Fourth Proportional to 1,870.28, 2,580.99 and 1,030.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.28 : 2,580.99 = 1,030.96 : x
2. Step 2: Convert to fraction form
   1,870.28/2,580.99 = 1,030.96/x
3. Step 3: Cross multiply
   1,870.28x = 2,580.99 × 1,030.96
4. Step 4: Simplify right side
   1,870.28x = 2,660,897.45
5. Step 5: Solve for x
   x = 2,660,897.45/1,870.28
6. Step 6: Final answer
   x = 1,422.73