Finding the Fourth Proportional to 1,127.58, 1,690.29 and 477.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.58 : 1,690.29 = 477.42 : x
2. Step 2: Convert to fraction form
   1,127.58/1,690.29 = 477.42/x
3. Step 3: Cross multiply
   1,127.58x = 1,690.29 × 477.42
4. Step 4: Simplify right side
   1,127.58x = 806,978.25
5. Step 5: Solve for x
   x = 806,978.25/1,127.58
6. Step 6: Final answer
   x = 715.67