Finding the Fourth Proportional to 1,054.69, 1,455.50 and 699.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.69 : 1,455.50 = 699.98 : x
2. Step 2: Convert to fraction form
   1,054.69/1,455.50 = 699.98/x
3. Step 3: Cross multiply
   1,054.69x = 1,455.50 × 699.98
4. Step 4: Simplify right side
   1,054.69x = 1,018,815.36
5. Step 5: Solve for x
   x = 1,018,815.36/1,054.69
6. Step 6: Final answer
   x = 965.99