Finding the Fourth Proportional to 1,291.29, 1,933.56 and 900.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.29 : 1,933.56 = 900.15 : x
2. Step 2: Convert to fraction form
   1,291.29/1,933.56 = 900.15/x
3. Step 3: Cross multiply
   1,291.29x = 1,933.56 × 900.15
4. Step 4: Simplify right side
   1,291.29x = 1,740,494.03
5. Step 5: Solve for x
   x = 1,740,494.03/1,291.29
6. Step 6: Final answer
   x = 1,347.87