Finding the Fourth Proportional to 1,061.93, 1,590.45 and 769.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.93 : 1,590.45 = 769.79 : x
2. Step 2: Convert to fraction form
   1,061.93/1,590.45 = 769.79/x
3. Step 3: Cross multiply
   1,061.93x = 1,590.45 × 769.79
4. Step 4: Simplify right side
   1,061.93x = 1,224,304.55
5. Step 5: Solve for x
   x = 1,224,304.55/1,061.93
6. Step 6: Final answer
   x = 1,152.91