Finding the Fourth Proportional to 1,448.72, 1,999.58 and 851.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.72 : 1,999.58 = 851.34 : x
2. Step 2: Convert to fraction form
   1,448.72/1,999.58 = 851.34/x
3. Step 3: Cross multiply
   1,448.72x = 1,999.58 × 851.34
4. Step 4: Simplify right side
   1,448.72x = 1,702,322.81
5. Step 5: Solve for x
   x = 1,702,322.81/1,448.72
6. Step 6: Final answer
   x = 1,175.06