Finding the Fourth Proportional to 1,370.64, 1,891.43 and 773.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.64 : 1,891.43 = 773.15 : x
2. Step 2: Convert to fraction form
   1,370.64/1,891.43 = 773.15/x
3. Step 3: Cross multiply
   1,370.64x = 1,891.43 × 773.15
4. Step 4: Simplify right side
   1,370.64x = 1,462,345.78
5. Step 5: Solve for x
   x = 1,462,345.78/1,370.64
6. Step 6: Final answer
   x = 1,066.91