Finding the Fourth Proportional to 1,511.64, 2,086.16 and 848.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511.64 : 2,086.16 = 848.72 : x
2. Step 2: Convert to fraction form
   1,511.64/2,086.16 = 848.72/x
3. Step 3: Cross multiply
   1,511.64x = 2,086.16 × 848.72
4. Step 4: Simplify right side
   1,511.64x = 1,770,566.69
5. Step 5: Solve for x
   x = 1,770,566.69/1,511.64
6. Step 6: Final answer
   x = 1,171.29