Finding the Fourth Proportional to 1,345.02, 1,856.12 and 848.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.02 : 1,856.12 = 848.31 : x
2. Step 2: Convert to fraction form
   1,345.02/1,856.12 = 848.31/x
3. Step 3: Cross multiply
   1,345.02x = 1,856.12 × 848.31
4. Step 4: Simplify right side
   1,345.02x = 1,574,560.92
5. Step 5: Solve for x
   x = 1,574,560.92/1,345.02
6. Step 6: Final answer
   x = 1,170.66