Finding the Fourth Proportional to 1,148.98, 1,720.59 and 906.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.98 : 1,720.59 = 906.82 : x
2. Step 2: Convert to fraction form
   1,148.98/1,720.59 = 906.82/x
3. Step 3: Cross multiply
   1,148.98x = 1,720.59 × 906.82
4. Step 4: Simplify right side
   1,148.98x = 1,560,265.42
5. Step 5: Solve for x
   x = 1,560,265.42/1,148.98
6. Step 6: Final answer
   x = 1,357.96