Finding the Fourth Proportional to 1,141.89, 1,575.70 and 669.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.89 : 1,575.70 = 669.76 : x
2. Step 2: Convert to fraction form
   1,141.89/1,575.70 = 669.76/x
3. Step 3: Cross multiply
   1,141.89x = 1,575.70 × 669.76
4. Step 4: Simplify right side
   1,141.89x = 1,055,340.83
5. Step 5: Solve for x
   x = 1,055,340.83/1,141.89
6. Step 6: Final answer
   x = 924.21