Finding the Fourth Proportional to 1,577.55, 2,365.23 and 699.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,577.55 : 2,365.23 = 699.58 : x
2. Step 2: Convert to fraction form
   1,577.55/2,365.23 = 699.58/x
3. Step 3: Cross multiply
   1,577.55x = 2,365.23 × 699.58
4. Step 4: Simplify right side
   1,577.55x = 1,654,667.60
5. Step 5: Solve for x
   x = 1,654,667.60/1,577.55
6. Step 6: Final answer
   x = 1,048.88