Finding the Fourth Proportional to 1,346.82, 1,859.52 and 992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.82 : 1,859.52 = 992.78 : x
2. Step 2: Convert to fraction form
   1,346.82/1,859.52 = 992.78/x
3. Step 3: Cross multiply
   1,346.82x = 1,859.52 × 992.78
4. Step 4: Simplify right side
   1,346.82x = 1,846,094.27
5. Step 5: Solve for x
   x = 1,846,094.27/1,346.82
6. Step 6: Final answer
   x = 1,370.71