Finding the Fourth Proportional to 1,123.76, 1,551.16 and 658

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.76 : 1,551.16 = 658 : x
2. Step 2: Convert to fraction form
   1,123.76/1,551.16 = 658/x
3. Step 3: Cross multiply
   1,123.76x = 1,551.16 × 658
4. Step 4: Simplify right side
   1,123.76x = 1,020,663.28
5. Step 5: Solve for x
   x = 1,020,663.28/1,123.76
6. Step 6: Final answer
   x = 908.26