Finding the Fourth Proportional to 1,141.68, 1,715.89 and 947.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.68 : 1,715.89 = 947.94 : x
2. Step 2: Convert to fraction form
   1,141.68/1,715.89 = 947.94/x
3. Step 3: Cross multiply
   1,141.68x = 1,715.89 × 947.94
4. Step 4: Simplify right side
   1,141.68x = 1,626,560.77
5. Step 5: Solve for x
   x = 1,626,560.77/1,141.68
6. Step 6: Final answer
   x = 1,424.71