Finding the Fourth Proportional to 1,111.82, 1,666.65 and 623.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.82 : 1,666.65 = 623.81 : x
2. Step 2: Convert to fraction form
   1,111.82/1,666.65 = 623.81/x
3. Step 3: Cross multiply
   1,111.82x = 1,666.65 × 623.81
4. Step 4: Simplify right side
   1,111.82x = 1,039,672.94
5. Step 5: Solve for x
   x = 1,039,672.94/1,111.82
6. Step 6: Final answer
   x = 935.11