Finding the Fourth Proportional to 1,020.65, 1,523.45 and 948.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.65 : 1,523.45 = 948.42 : x
2. Step 2: Convert to fraction form
   1,020.65/1,523.45 = 948.42/x
3. Step 3: Cross multiply
   1,020.65x = 1,523.45 × 948.42
4. Step 4: Simplify right side
   1,020.65x = 1,444,872.82
5. Step 5: Solve for x
   x = 1,444,872.82/1,020.65
6. Step 6: Final answer
   x = 1,415.65