Finding the Fourth Proportional to 1,776.20, 2,451.15 and 1,030.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.20 : 2,451.15 = 1,030.31 : x
2. Step 2: Convert to fraction form
   1,776.20/2,451.15 = 1,030.31/x
3. Step 3: Cross multiply
   1,776.20x = 2,451.15 × 1,030.31
4. Step 4: Simplify right side
   1,776.20x = 2,525,444.36
5. Step 5: Solve for x
   x = 2,525,444.36/1,776.20
6. Step 6: Final answer
   x = 1,421.82