Finding the Fourth Proportional to 1,026.63, 1,539.89 and 377.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.63 : 1,539.89 = 377.31 : x
2. Step 2: Convert to fraction form
   1,026.63/1,539.89 = 377.31/x
3. Step 3: Cross multiply
   1,026.63x = 1,539.89 × 377.31
4. Step 4: Simplify right side
   1,026.63x = 581,015.90
5. Step 5: Solve for x
   x = 581,015.90/1,026.63
6. Step 6: Final answer
   x = 565.94