Finding the Fourth Proportional to 1,123.14, 1,548.24 and 972.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.14 : 1,548.24 = 972.78 : x
2. Step 2: Convert to fraction form
   1,123.14/1,548.24 = 972.78/x
3. Step 3: Cross multiply
   1,123.14x = 1,548.24 × 972.78
4. Step 4: Simplify right side
   1,123.14x = 1,506,096.91
5. Step 5: Solve for x
   x = 1,506,096.91/1,123.14
6. Step 6: Final answer
   x = 1,340.97