Finding the Fourth Proportional to 1,092.15, 1,507.41 and 699.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.15 : 1,507.41 = 699.30 : x
2. Step 2: Convert to fraction form
   1,092.15/1,507.41 = 699.30/x
3. Step 3: Cross multiply
   1,092.15x = 1,507.41 × 699.30
4. Step 4: Simplify right side
   1,092.15x = 1,054,131.81
5. Step 5: Solve for x
   x = 1,054,131.81/1,092.15
6. Step 6: Final answer
   x = 965.19