Finding the Fourth Proportional to 1,530.06, 2,111.67 and 909.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.06 : 2,111.67 = 909.06 : x
2. Step 2: Convert to fraction form
   1,530.06/2,111.67 = 909.06/x
3. Step 3: Cross multiply
   1,530.06x = 2,111.67 × 909.06
4. Step 4: Simplify right side
   1,530.06x = 1,919,634.73
5. Step 5: Solve for x
   x = 1,919,634.73/1,530.06
6. Step 6: Final answer
   x = 1,254.61