Finding the Fourth Proportional to 1,111.50, 1,669.05 and 930.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.50 : 1,669.05 = 930.24 : x
2. Step 2: Convert to fraction form
   1,111.50/1,669.05 = 930.24/x
3. Step 3: Cross multiply
   1,111.50x = 1,669.05 × 930.24
4. Step 4: Simplify right side
   1,111.50x = 1,552,617.07
5. Step 5: Solve for x
   x = 1,552,617.07/1,111.50
6. Step 6: Final answer
   x = 1,396.87