Finding the Fourth Proportional to 1,531.50, 2,282.72 and 1,485.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.50 : 2,282.72 = 1,485.33 : x
2. Step 2: Convert to fraction form
   1,531.50/2,282.72 = 1,485.33/x
3. Step 3: Cross multiply
   1,531.50x = 2,282.72 × 1,485.33
4. Step 4: Simplify right side
   1,531.50x = 3,390,592.50
5. Step 5: Solve for x
   x = 3,390,592.50/1,531.50
6. Step 6: Final answer
   x = 2,213.90