Finding the Fourth Proportional to 1,051.69, 1,577.58 and 618.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.69 : 1,577.58 = 618.52 : x
2. Step 2: Convert to fraction form
   1,051.69/1,577.58 = 618.52/x
3. Step 3: Cross multiply
   1,051.69x = 1,577.58 × 618.52
4. Step 4: Simplify right side
   1,051.69x = 975,764.78
5. Step 5: Solve for x
   x = 975,764.78/1,051.69
6. Step 6: Final answer
   x = 927.81