Finding the Fourth Proportional to 1,061.75, 1,585.16 and 907.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.75 : 1,585.16 = 907.73 : x
2. Step 2: Convert to fraction form
   1,061.75/1,585.16 = 907.73/x
3. Step 3: Cross multiply
   1,061.75x = 1,585.16 × 907.73
4. Step 4: Simplify right side
   1,061.75x = 1,438,897.29
5. Step 5: Solve for x
   x = 1,438,897.29/1,061.75
6. Step 6: Final answer
   x = 1,355.21