Finding the Fourth Proportional to 1,051.80, 1,577.56 and 760.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.80 : 1,577.56 = 760.69 : x
2. Step 2: Convert to fraction form
   1,051.80/1,577.56 = 760.69/x
3. Step 3: Cross multiply
   1,051.80x = 1,577.56 × 760.69
4. Step 4: Simplify right side
   1,051.80x = 1,200,034.12
5. Step 5: Solve for x
   x = 1,200,034.12/1,051.80
6. Step 6: Final answer
   x = 1,140.93