Finding the Fourth Proportional to 789.03, 1,181.72 and 761.69

Step by Step Solution

1. Step 1: Write the proportion equation
   789.03 : 1,181.72 = 761.69 : x
2. Step 2: Convert to fraction form
   789.03/1,181.72 = 761.69/x
3. Step 3: Cross multiply
   789.03x = 1,181.72 × 761.69
4. Step 4: Simplify right side
   789.03x = 900,109.17
5. Step 5: Solve for x
   x = 900,109.17/789.03
6. Step 6: Final answer
   x = 1,140.78