Finding the Fourth Proportional to 1,111.38, 1,665.18 and 623.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.38 : 1,665.18 = 623.22 : x
2. Step 2: Convert to fraction form
   1,111.38/1,665.18 = 623.22/x
3. Step 3: Cross multiply
   1,111.38x = 1,665.18 × 623.22
4. Step 4: Simplify right side
   1,111.38x = 1,037,773.48
5. Step 5: Solve for x
   x = 1,037,773.48/1,111.38
6. Step 6: Final answer
   x = 933.77