Finding the Fourth Proportional to 1,354.12, 1,868.59 and 764.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.12 : 1,868.59 = 764.74 : x
2. Step 2: Convert to fraction form
   1,354.12/1,868.59 = 764.74/x
3. Step 3: Cross multiply
   1,354.12x = 1,868.59 × 764.74
4. Step 4: Simplify right side
   1,354.12x = 1,428,985.52
5. Step 5: Solve for x
   x = 1,428,985.52/1,354.12
6. Step 6: Final answer
   x = 1,055.29