Finding the Fourth Proportional to 1,054.77, 1,574.15 and 1,030.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.77 : 1,574.15 = 1,030.20 : x
2. Step 2: Convert to fraction form
   1,054.77/1,574.15 = 1,030.20/x
3. Step 3: Cross multiply
   1,054.77x = 1,574.15 × 1,030.20
4. Step 4: Simplify right side
   1,054.77x = 1,621,689.33
5. Step 5: Solve for x
   x = 1,621,689.33/1,054.77
6. Step 6: Final answer
   x = 1,537.48