Finding the Fourth Proportional to 1,182.90, 1,770.71 and 771.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.90 : 1,770.71 = 771.15 : x
2. Step 2: Convert to fraction form
   1,182.90/1,770.71 = 771.15/x
3. Step 3: Cross multiply
   1,182.90x = 1,770.71 × 771.15
4. Step 4: Simplify right side
   1,182.90x = 1,365,483.02
5. Step 5: Solve for x
   x = 1,365,483.02/1,182.90
6. Step 6: Final answer
   x = 1,154.35