Finding the Fourth Proportional to 1,623.88, 2,437.55 and 699.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.88 : 2,437.55 = 699.89 : x
2. Step 2: Convert to fraction form
   1,623.88/2,437.55 = 699.89/x
3. Step 3: Cross multiply
   1,623.88x = 2,437.55 × 699.89
4. Step 4: Simplify right side
   1,623.88x = 1,706,016.87
5. Step 5: Solve for x
   x = 1,706,016.87/1,623.88
6. Step 6: Final answer
   x = 1,050.58