Finding the Fourth Proportional to 1,530.18, 2,111.67 and 940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.18 : 2,111.67 = 940.50 : x
2. Step 2: Convert to fraction form
   1,530.18/2,111.67 = 940.50/x
3. Step 3: Cross multiply
   1,530.18x = 2,111.67 × 940.50
4. Step 4: Simplify right side
   1,530.18x = 1,986,025.64
5. Step 5: Solve for x
   x = 1,986,025.64/1,530.18
6. Step 6: Final answer
   x = 1,297.90