Finding the Fourth Proportional to 1,385.42, 1,912.20 and 943.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.42 : 1,912.20 = 943.50 : x
2. Step 2: Convert to fraction form
   1,385.42/1,912.20 = 943.50/x
3. Step 3: Cross multiply
   1,385.42x = 1,912.20 × 943.50
4. Step 4: Simplify right side
   1,385.42x = 1,804,157.16
5. Step 5: Solve for x
   x = 1,804,157.16/1,385.42
6. Step 6: Final answer
   x = 1,302.24