Finding the Fourth Proportional to 1,111.83, 1,534.50 and 669.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.83 : 1,534.50 = 669.81 : x
2. Step 2: Convert to fraction form
   1,111.83/1,534.50 = 669.81/x
3. Step 3: Cross multiply
   1,111.83x = 1,534.50 × 669.81
4. Step 4: Simplify right side
   1,111.83x = 1,027,829.20
5. Step 5: Solve for x
   x = 1,027,829.20/1,111.83
6. Step 6: Final answer
   x = 924.45