Finding the Fourth Proportional to 1,385.56, 1,912.61 and 943.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.56 : 1,912.61 = 943.70 : x
2. Step 2: Convert to fraction form
   1,385.56/1,912.61 = 943.70/x
3. Step 3: Cross multiply
   1,385.56x = 1,912.61 × 943.70
4. Step 4: Simplify right side
   1,385.56x = 1,804,933.61
5. Step 5: Solve for x
   x = 1,804,933.61/1,385.56
6. Step 6: Final answer
   x = 1,302.68