Finding the Fourth Proportional to 1,345.83, 1,856.72 and 992.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.83 : 1,856.72 = 992.60 : x
2. Step 2: Convert to fraction form
   1,345.83/1,856.72 = 992.60/x
3. Step 3: Cross multiply
   1,345.83x = 1,856.72 × 992.60
4. Step 4: Simplify right side
   1,345.83x = 1,842,974.85
5. Step 5: Solve for x
   x = 1,842,974.85/1,345.83
6. Step 6: Final answer
   x = 1,369.40