Finding the Fourth Proportional to 1,335.16, 1,842.60 and 775.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.16 : 1,842.60 = 775.45 : x
2. Step 2: Convert to fraction form
   1,335.16/1,842.60 = 775.45/x
3. Step 3: Cross multiply
   1,335.16x = 1,842.60 × 775.45
4. Step 4: Simplify right side
   1,335.16x = 1,428,844.17
5. Step 5: Solve for x
   x = 1,428,844.17/1,335.16
6. Step 6: Final answer
   x = 1,070.17