Finding the Fourth Proportional to 1,111.67, 1,666.89 and 699.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.67 : 1,666.89 = 699.93 : x
2. Step 2: Convert to fraction form
   1,111.67/1,666.89 = 699.93/x
3. Step 3: Cross multiply
   1,111.67x = 1,666.89 × 699.93
4. Step 4: Simplify right side
   1,111.67x = 1,166,706.32
5. Step 5: Solve for x
   x = 1,166,706.32/1,111.67
6. Step 6: Final answer
   x = 1,049.51